I finally reached 1000 ELO after playing since June 2022,
Congrats, that is actually really fast improvement.
Now celebrate the occasion by learning that it is not ELO, but Elo. It is not an acronym, it is named after the guy who invented it.
As for advice: you are improving rapidly, so my advice is that you should just keep doing whatever you are doing, it is working. Don't change the winning team.
I finally reached 1000 ELO after playing since June 2022, learned some openings and tactics but need advice on where and what to learn next. I hope to reach 1200 before the end of this year
Rapid:
Blitz: