Sierra Vocab: Read "1100 words you should know" get the free pdf btw, then do AT LEAST 5 words a week. Also whenever you are watching Youtube or a show and a word is unfamiliar to you try to search up that word, remember its meaning, and then apply it a sentence. For example when I was watching Korra(don't bully me pls I was bored af) the earth queen said "magnanimous" and I was like "What the hell is that" so I searched it up then said a sentence in my head that described someone as magnanimous. It's the atomic habits that really help you in the long run, always remember that.
I don't really have any tips for writing. Didn't do a single practice essay before my year 10 entry test