J'comme au Pologne = You can't write this "J'comme" because "c" is a consonnent. In French we don't write "J' + consonnent" but when you hear someone talking you can hear sounds like " j'viens " "j'suis" but you can't write it, it's only orally. 

J'habit = Verb conjugated with the first person of singular, you always put a "e" at the end for this kind of verb which belongs to the "Verb of the first groupe"  (like "habiter" "marcher" "aimer" "commencer" etc.).

petit = "Petit" is for masculine, you put a "e" at the end for the feminine and "ville" is a feminine noun.

Je suis vingt ans = In French we use the verb "AVOIR" to say our age.

ma anniversaire = "Anniversaire" is a masculine noun so you can't say "ma" because "ma" is for feminine noun. You have to make the possessive pronoun agree with the noun. 

mon meilleure mois = "meilleur" means "best", you will better use the word "préféré" which means "favorite". Or you can say "Selon moi, Décembre c'est le meilleur mois de l'année" (According to me, December is the best month of the year).

Toujours j'aime l'hivre = You have to use the "passé composé" in french, which is the most used tense in French to indicate the past. 

Passé composé = auxillaire conjugated (verb "être" or "avoir") + verbal base + é 

Exemple : J'ai habité = Je + Verb "Avoir" conjugated + Verb "habiter" with the at the end " é "

And "hivre" doesn't exist in french, it's "hiver. 

parce que alors j'ai ensuite = it means absolutely nothing (sorry I don't want to be nasty, I only want you to explain :) ) 

parce que = because 

alors = so / then ... 

ensuite = next 

In this case you would say "j'aime beaucoup l'hiver parce que c'est à cette période que je passe le plus de temps avec ma famille". 

Quelques mots sur moi... 

J'ai vingt ans. Je celebre mon anniversaire en Decembre, c'est mon mois préféré.

J'ai toujours aimé l'hiver, parce-queje passe du temps avec ma famille. 

J'ai beaucoup d'interets, comme l'art, la gymnastique, la mode et surtout  les voyages. C'est ma passion.
J'ai déjà fais le tour de toute l'Europe en je voudrais visiter les USA (?!). C'est mon grand rêve.

Je suis très active. Le weekend je vais faire du cheval, je joue au tennis et je nage dans la piscine.
Je suis aussi tres communicative. J'adore passer du temps avec mon copain et famille.
J'aime aussi rencontrer de nouvelles personnes.

Je ne veux pas regarder la télévision, parce que ce n'est pas bon pour la santé. Je préfère lire des livres.
Mais, je passe beaucoup de temps sur mon ordinateur et ça aussi ce n'est pas bon pour ma santé ;)

J'ai un petite  famille et j'ai deux chats. J'adore les animaux, parce-que ils sont amicaux et tres amusant.
J'ai une soeur. Elle est plus jeune. Elle a quinze (15) ans.

A l''avenir, j'aimerais parler le francais parfaitement! 
Bissous,
Elwira

P.S. Hello! I am glad you have entered my diary.
Please help me correct my work. I've used google translator for some words, mainly vocab.
Thanks,
Elwira

Correction, i've forgot something

Toujours j'aime l'hivre = You have to use the "passé composé" in french, which is the most used tense in French to indicate the past. 

Passé composé = auxillaire conjugated (verb "être" or "avoir") + verbal base + é (for the verb of the first group it's " é " at this end but for the other verb it depends)

Exemple : J'ai habité = Je + Verb "Avoir" conjugated + Verb "habiter" with the at the end " é "

And "hivre" doesn't exist in french, it's "hiver. 

la plupart interesse = "la plupart" means "most of". " interesse" is not a noun, it's the conjugated form of the verb "s'interesser" at the first person of singular.

I guess you meant that you especially love travelling, in this case you use the word "surtout" which means "especially".

Deja je fait le tour =  Are you currently doing a trip around Europe or did you mean that you've already done an European trip? 

In the first case you would say "Je fais actuellement le tour de l'Europe" in the second case you have to use the past to tell that's something which is yet done: "J'ai fais le tour de l'Europe". 

Actif = It's for masculine, as you're a girl you say "active"

Le week-end j'ai aller/ joue /j'ai nagge = You can't say "j'ai aller" you would say "je suis allée" and you would say "j'ai nagé". You also have to use the past for all the verb, so you would also say "j'ai joué" and not "joue". 

En plus je suis = In this case you would rather use "Je suis aussi..." 

mon copains = Is there several "copains" or is there just one? If there is just one you write "copain" without "s" at the end. If there are several, you have to use the pronouns "mes" to indicate the plural. 

Familie = "Famille" is right

recontrer d'nouvelles personnes = "rencontrer " and not "recontrer. "d' " is a little bit "familiar" you would rather say "des nouvelles personnes". 

d'regarde l'television = "regarder la télévision" in this case you can absolutely not write (and say) " l'television " it doesn't exist. 

en bonne santé = " être en bonne santé " means " be in good health " if you meant "not healthy " (not good for the health) you would say "ce n'est pas bon pour la santé" 

très grand = In this case you use "beaucoup" (a lot of) 

cette = "cette" is to indicate something " je trouve que cette table est grande " (I find this table big), in this case you use "ça" like in english "it". I'm sorry for the explanation, I'm not a good teacher and I can't explain you why we say that but if you speak well english I think you can easily understand my explanation with comparing french with english.

dans moi santé = pour ma santé. Moi means "I" or "Me". 

un petit familie = Famille is a feminine noun, so as said before "unE petitE" 

chants = "chants" means "songs" I guess you wanted to talk about your cat, so "chat" in french

un soeur = "soeur" is a feminine noun so "unE"

l'avenir j'ai voudrais = Why do you use the past? (j'ai) Here we're talking about the future (avenir = future) so can't use the past. 

l'français parfait = You can say " le français parfaitement " (I would like to speak perfectly french") or "un français parfait " (a perfect french). 

It's pretty good! Go on :) 

It was a pleasure to help you !! really!! :)