Stay married to Hi-Lo ...
Until you have at the very least 500 hours at the tables study "Blackjack Attack" and polish your Hi-Lo game. Add more index numbers if you are bored.
If, at that point, you are serious about BJ and expect to put in a lot of time at the tables - with a sufficient bankroll of course - then you may consider stepping up to a Level 2 count.
For shoe games I suggest the "ZEN Count"
If you play primarily "pitch games" then study "Hi-Opt II"
These level 2 counts earn more money, but only if they are played error-free. They are more powerful, but for a casual player who plays once a week for 5 or 6 hrs. they are overkill. If you are planning on playing Semi-Pro then the investment of time and effort in training yourself to be utterly proficient with a Two-Level count.
I say "utterly proficient" because if you make errors, (with a harder Count), you will lose back more than these stronger Counts will provide you. These harder Counts are not for everyone.
'YMMV'