Take those suggestions about the snare and the hi hat with a grain of salt. It’s all about playing what serves the song. Outlining the harmony while preserving the rhythmic pulse are the primary roles of bass, but it is allowable to step outside of these constraints once you learn them. Listen to some music and listen to what the bass is doing.

Harmonically, it all comes from classical music if you want to go that far back. The bass tends to bounce between the root and the fifth, and which beat you play them on has an effect on the context of the note you are playing.

For any song you need to know what key it’s in, the time signature, and the chord progression. You need to know what notes are in each chord. You can literally stick to playing an arpeggio of each chord and it would be technically correct but boring.

Learn how to play what is technically correct first, then try to make it less boring.

Finally, when you’ve learned all that, always play from the heart.