With $20 you could play compression, I recommend at least $50, now if you consider yourself a relatively good player, you could play at 0.01/0.02 cash tables where the entry is $0.80 to $2, also MTT or SnG where the entry is the lowest (0.14-0.25) of course you will find a lot of registered players.
Also satellite tournaments where the repurchase is minimal and always focused playing, if you lose and are going to re-enter, do so as long as the BB does not exceed the amount of chips you will have (minimum 20BB). It's an analysis so that you don't feel so much pressure to lose your entire bank.
If you're losing a lot and you've lowered your bank by 25%, you'd better stop the game, rest for a day or two, clear your mind, study, analyze your
hands with some program, comment on the forum (here we'll always support you and give you advice, and many of them from experienced professionals in SnG, MTT and cash tables.
If you want but not to lose your bank, play the
freerolls and thus you are full of experience with respect to the variance, you are filled with patience with the bad beats.
Luck and success.