Well-written article, and I agree with most points as a language learner. But I do think that someone with a very solid A2 foundation can more than just flounder about. The problem is that the majority of learners at this level haven’t actually “absorbed” A2 topics yet. (I could say the same of some of my fellow learners at B1, or even B2 classes!) 

待ち合わせ　is a combination of two words: 待つ　(to wait) and 合わせる (to bring together). So if you look at the literal meaning, it's like "waiting for each other."] That's why 待ち合わせ is used when you set an appointment to meet with somebody. The verb is 待ち合わせる by the way. On the other hand, 出会い is a combination of 出る (to go out) and 会う (to meet). Again, literally the person goes out and meets somebody. But there is no connotation of an appointment unlike 待ち合わせる. If you meet somebody else while you're out by coincidence, it's like fate. This is why 出会い is ONLY used when meeting someone for the first time. You can't use it for someone you've already met, unless you were talking about the first time you met that person. Also, 出会い is a noun. The verb is 出会える。

「母に教えてくれたとおり」ではなく 「母が教えてくれた通り」が正しいです。

Je suis là

Bonjour à tous!
Je m'appelle Grace et je suis américaine. <strike>J'ai</strike>  <font style="background-color: yellow;">Je suis</font> née en Chine. Je ne parle pas chinois<strike><font style="background-color: yellow;">e</font></strike>. J'ai quatre sœurs et deux frères. Ma famille est grande. Nous vivons dans une grande maison. Notre maison est ancienne. <strike>Il</strike> <strike>était</strike> <font style="background-color: yellow;">Elle a été</font> construit<font style="background-color: yellow;">e</font> <strike>dans le siècle de</strike>  <font style="background-color: yellow;">au</font> dix-huitième <font style="background-color: yellow;">siècle</font>.

Notes:

1) naître takes the auxiliary verb "être"

2) The language is chinois, the female national (or adjective modifying a female-gendered noun) is chinoise.

3) Elle a été construite - "Elle" because it refers to "La maison", "a été construite" is the passive form (was contructed), "construite" agrees with "elle/la maison". You can't use the imparfait "était" here because the act of construction would have been done once in the past and ended. It's not a description like "Elle était petite."

4) "au XXX siècle" is the  standard way of saying it (no other way around it but to memorize which prepositions go for each word).

P.S. I'm not a native speaker so it's possible I may have made some mistakes.

February 18th Saturday.

How old is your sister? → My sister is eleven <font style="background-color: yellow;">y</font>ears old.
What kind of music do you like? → I like pop music.
Do you like music? → Yes, I do. I listen <strike>to</strike> <font style="background-color: yellow;">during</font> my spare time.
Do you like running? →Yes, I do. I am going to run tomorrow.
What time is it now? → It's 9:00 PM.
Are you busy on Sunday? → I am not busy.
It was cold today. Today I went shopping and <font style="background-color: yellow;">went to/visited </font>grandpa 's house.
I am not free tomorrow.

My school life

I'm a second year university student. I major in nutrition.
It's more busy than I had expected.
<strike>And</strike> <font style="background-color: yellow;">On the other hand</font>, my friends who major in arts have a lot of time, so they lead a <strike>dissipated</strike> <font style="background-color: yellow;">more carefree</font> life. They sometimes skip <strike>the</strike> class but they can pass<strike> on </strike><font style="background-color: rgb(255, 255, 0);"> and move up to</font> the next <strike>glade </strike><font style="background-color: yellow;">grade.</font>
I don't think we are the same university student. 「同じ大学生とは思えない」を言いたかったと思いますがこのsentenceでは違和感を感じます。言い方を変えないといけないかもしれない<font style="background-color: yellow;"><font style="background-color: yellow;">。</font>I can't believe we're all university students! はどうですか？</font>
But <strike>I</strike> <font style="background-color: yellow;">I</font> think <strike>i</strike><font style="background-color: yellow;"> I</font> entered<strike> in the</strike> university to study nutrition and become <font style="background-color: yellow;">a</font> nutritionist in the future, so <strike>i</strike><font style="background-color: yellow;"> I</font> keep up <strike>however i'm in hard </strike><font style="background-color: yellow;">even though it's hard for me.</font>

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<font style="background-color: yellow;">*These are just my suggestions!  Good luck with your studies! (^_^)
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My first talking on English for time speaking English in a long time

I talked with a native English speaker today. It was the longest I talked on the Skype in the past two years I have had the longest talking on Skype. By the way, Skype is my favorite service to talk with people. It was difficult for me because of a I had a long break in communication on communicating in English. We was talking  talked for two hours about hobbies, interests and about each other's lives. I like that I can easily understand Canadian English...hahah.
I realized today that practicing a language is a better way to improve it. You know, my speaker the person I talked with from Toronto told spoke slowly but sometimes I couldn't understand him. Maybe sometimes I'm was not attentive or I just don't didn't know those the words that he used in himself  his speech. Today I have nothing more to say. Better: That's all for today.

These are just my suggestions. Good luck with your studies !