You are going to be stuck at 1800 for ages. When I was 1800, I was stuck there for almost a year. Concentrate on tactics, and stop playing if you lose more than 2 games in a row to break losing streaks. It's natural to have good days, and bad days.
Tips for my elo

I try to limit myself to two loses a day. I don't always manage to stick to it but I find that I am better resetting with some puzzles and then coming back and trying again tomorrow. Perhaps looking at what line I got wrong or what I should have done differently in the defeats.

I’ve been there. What I do is i limit games I play daily. Like i play 2 rapid chess games daily. But if you’re feeling confident, play 4 or 5. Just stop playing once you lost once or teice

See my forum post The Truth Hurts: PSA. But the most important thing is, indeed, to get a lot better at tactics.
Can anybody give me tips to break plateau? I’ve been stuck at around 1650-1800 elo for 3 months. I’ve only been playing rapid for a month though, can anybody who has also experienced a plateau tell me what they did to break it. What happens to me is I go on big win streaks but then go on big lose streaks a lot of times