post offices

It is popularly beleived("i" before "e" except after "c" and words that rhyme with "weigh".   butI think this might just be a typo because later you spell it correctly) that post offices are becoming less popular and they will soon disappear. A lot of people think that these institutions are no longer necessary. I would like to explain my point of view on this situation.
There are many things to be against this opinion. Firstly, some people still use post the post office to contact with others (one could say "...connect with others). Older generations can't work with the Internet, anyway. Moreover, classical letters let us feel the spirit of the past.
Some people believe that post offices aren't necessary anymore. I disagree with this statement because the establishments like these are the part of the history.
In conclusion, it seems to me that post offices have to be in our society. In my opinion, they are still necessary even in the age of the Internet.

(very nice!  there are some repetitions that are unnecessary but for the purpose of practice it's fine.)

I think Killian is the name of the dog. So the reporter said "You've Killian with you" . meaning that the dog is there with them. I have the same problem often while learning Spanish.

Good going, Jader Junior!

Let's practice

Hi! Is it ok? (or ."Is everything ok?")
I'm Jader Júnior, I'm from Brazil. Let's begin.

Words
I need to study more.
I've more luck than just my own luck.
Do you like gym?
Did you remember of yesterday? yes or no?  (or "Do you remember yesterday?")
I want to learn to speak English!

Yes, we pick people up AT the bus station or airport, etc. You can pick up the baby off the floor or just pick him/her up. There is the slang use when I was young, we would "pick up" girls at the beach but not really lift them off the ground...it meant to get a date. Also, when I go to the store my wife asks me to "pick up" some bread or milk while I'm there...she meant "buy" or" bring home". My mother used to tell me to "pick up" my feet when I was walking...which if I had been able to, it would have been impossible to walk....she meant "lift" my feet up higher or "step" higher so not to scuff my shoes. I bet there are other uses of the phrase.

agrimony is a flower. perhap equanimity?

“Says” is present tense and describes an ongoing action. So when you’re reporting something someone said in the past and just once, “said” is more logical. "Says" brings us closer to the action. If you are writing, "said" is never wrong but some people might take exception to "says"...though many won't even notice. However, I would try to be consistent. If you are using the present tense, try to use the present tense throughout your article and the same if you use the past tense.