Lots of good advice here.

My piece below.

I would say that watching vids where others plays similiar limits to the ones you play can be very helpful. You will easily find some cheap subscriptions on training sites. In your place I would watch the vids from 2 to 10nl, note and then try to execute.

Another thing I could suggest is to invest more to get thr things going. If you can affort it of course. So buy a subscription, watch some vids. Take a roll for 5nl maybe and try what you have learned.

Btw. do you play 6max or FR, how many tables, how long did it take to make those 3500ish hands?