i had the same problem when i was playing like 2 tables cuz you dont get a ton of hands worth playing. Now im up to about 4-5 tables at a time and theyre all "fast" tables. Alot of ppl do alot more than 4-5 but it is plenty to keep me busy to the point where i dont have time to play my J9 at one table because i have AK and QQ at two others
so try more tables (if your bankroll allows it)? or fast tables?