cdog

I'd agree with all of the above : your role in the jam session is to drive the rhythm and to help the other musicians to anticipate what's coming ( which is what a good drummer does too eg any song by the pixies). So I'd be really focussing on roots and 5ths, and leading up and down to changes with runs where appropriate. Keeping it simple and in time will be much better for the group than trying to put loads of notes in. At home I'd play along to jam tracks on YouTube where you can experiment with your runs and make your mistakes.

Cool, thanks 👍👍

No it's not smart like that, just like a drum box app. It's free though and so I try to practice with it to help my timing

Here's some recordings, but the guitarist has moved to electric now, so I'd say the folky feel has gone a bit. It's the ones marked live. Woman is the most poppy https://m.soundcloud.com/user-956758613

The SBL groove trainer has a setting that plays a drum beat that then drops out and in again which is good for internal timing, but I don't think that's quite what you're looking for.