I was in exactly the same shoes as you. So I went through the Community posts, made a few notes and designed a strategy which has done exactly what I was looking for - keeping the variance at the manageable level while making an adequate CLV profit. So far, my maximum variance has been at about +/- 10% from CLV.
What has worked for me:
Betting on pretty much everything except some questionable low tier games, esports and baseball (you can get different opinions here though).
Making as many bets as I can while making sure not betting twice on the same game. At the end, it’s all about diversification and turnover.
Keeping Kelly at 30%, max size at 1.5%, odds 1.4-2.8, value at around and above 4%.
Bearing in mind that the value volatility increases with the time to the game start. So you want to target higher value for the games further in the future.
The default settings are already quite well tuned for most users.
If you have a small bankroll, the only setting I would change is increasing minimum value to 4%, or even 5% as long as you can turnover a good volume of bets every day.