I think your grammar is fine and I can understand you perfectly.
I can see that English is your second language because of the words you choose and the way you use them but it doesn't matter because there are so many ways you can speak English.
文法がいいと思って、ちょうど分かりました。
(I think your grammar is good and I can understand you perfectly)
あなたの英語が少し変ですけど英語は色々な話す方があ るから、心配しないでください。
(Although your English is a little bit strange, don't worry because there are many ways you can speak English.)
とにかく、あまり書けません。日本語は去年だけ初めて 勉強したんです。
(Anyway, I can't write much. I only started studying Japanese last year)
Here are a few small mistakes.
but it's never been easy!
but it hasn't been easy
grammer
grammar
I don't want to do such thing I did when I was a beginner...
I didn't want/never wanted to do this when I was a beginner
so I am afraid I could sound rude to someone again without me noticing it! so, if I write anything here sounds not-nice (rude), I probably didn't mean it, "excuse me and forgive me!" in advance!
so I am afraid
THAT I could sound rude to someone again without me noticing
it! If I write anything here that sounds rude, I probably didn't mean
it so "excuse me and forgive me" in advance.
(Just a tip, an exclamation mark ends a sentence in the same way a full stop does. I don't think there are any exceptions.)