I tried multiple formats so far, but I neglected the one I'm most expirienced with, which is SnG's. Back in the day I played mostly sit & go's on zynga poker (play money).
But when I rediscovered poker on twitch not many months a go, I tried tournaments and these spin & go's. Won a few tournaments but then lost my bankroll.
After I watched a bencb video, where he say you should stick to the one game your best at when a beginner, it made sense to try only SnG's (5 seats).
And voila, now I'm slowly building bankroll.
Also I try to study what's reccommended on here and other platforms.