In my opinion I think the best thing to do is not to worry about your progress, enjoy the road as much as you can and try to improve without pressure and sooner or later you will realize that you improved a lot.
Also, try NOT to play converted maps and don't abuse DT now that you are just starting to play, focus on your accuracy and osu!mania basics.
dont worry about improvement rn, just try play 4k and 7k and some others like 6k or 8k and enjoy the game. youll imprive faster that way pribably as less burn out
istg im half of the mania forum's activity its kinda insane