As you all know, we Chinese are not very into coffee, we just like drinking tea.

You've used "not very into" perfectly correctly here, but I feel it's worth pointing out that it's quite colloquial.

I might prefer "only" instead of "just" here, "just" feels more appropriate as meaning something like "this is not significant; there is no deeper meaning; it is simply thus": "I don't *hate* coffee, I just like drinking tea" means "don't assume that I hate coffee because I don't drink it. I simply like drinking tea, that's all." Possibly this actually is what you meant! But anyway, "just" does work, I'm /just/ not sure I'd use it here.

This Ccafe is located on the first floor of my office building.

I often smelled the strong fragrance from it, and it was very tempting.

Correct grammar, but a little unusual to use simple past tense here. It seems to imply that you don't smell it any more. I would prefer present perfect, to express, I suppose, an ongoing state or habitual action.

"I have often smelled the strong fragrance from it, and it's been very tempting."

Simple present "I often smell" would work too... I think I prefer present perfect because it draws attention to how you smelling in the past has had a present consequence - that you've gone into the shop and bought a coffee.

A few times I wanted to get into it to have a tryo in and try some, but eventually I didn't go because I think coffee from this kind of shop is always overpriced.

"to get into" is more about entering a remarkably enclosed space (you get into a box, or a car, or an attic, or a bath), or to become interested in a field - "I got really into Pokemon cards". Or tea :) And "have a try" is I think something you'd usually say about an *activity*. It's not wrong to say you might have a try at coffee-drinking, but it's weird because you can obviously just try some coffee.

Again these tenses are fine but I would prefer "A few times I've wanted to go in and try some, but I haven't, because I thought coffee from this kind of shop is always overpriced."

This afternoon itwas raineding when I finished my job, and it was too earliery to go home at that time, so I decided to go to the shop for a cup of coffee.

I think you mean "too early". But possibly "it was a time earlier than I could go home."

Simple past tense is perfect here, you've begun telling a story of single past events.

OThe way you ordering is through myour phone,. I scanned a QR first, then ordered a cup of sugar-free classic latte and a piece ofn oat grape cookies.

That introductory clause seems better as its own sentence, because the sequence of events stands on its own and it's not really part of them. And I changed it to use "generic you".

I think you mean "a cookie", and I can see why you would try "a piece of cookies". But cookies are countable and we can definitely just have one of them. They're not confusing, like cake :)

I didn't know the right way to drink coffee, so I just took off the cup caplid and drank it like it was boiled water.

I don't think there's any sensible reason why "cap" doesn't work here, but it doesn't. Bottles have caps, cups have lids.

I also tasted the cookies.

I still think this is a single cookie. But perhaps you meant "some oat grape cookies" earlier.

It was a little too sweet (I hate eating sugar contained cookiescookies with sugar in).

To use "contain" here you'd say something like "sugar-containing cookies", "cookies that contain sugar", "cookies containing sugar". But "with" is a lot more natural.

The reason I ordered latte is because I often see coffee items of "latte" in many English learning materials.

You would probably just say 'I often see "lattes"', or 'I often see coffees with "latte" in their names'. What you have is an idiosyncratic but charming way to say it and I don't really want to correct it!

But its taste was not bad tooeither, thick and with strong fragrance, and that wa's my thing.

I think you mean this? "my thing" can be something you're enthusiastic about or known for. It's another colloquialism. You'd bring that up to the present tense, usually, unless you want to imply that it's not your thing any more.

We prefer "either" after a negative statement where we would use "too" if it were a positive one. "Its taste was good too"; "Its taste was not bad either".