Don't be afraid to take a break! And feel absolutely free to come back to anything whenever you want. (Getting organized about it is the other task that needs to be addressed seperately, but I find keeping detailed notes that work with your brain can often cover that, and it should not require worrying about.)

I'm a on-and-off learner myself and I think it matters the most we don't make our quits final. It's not like with relationship responsibilities or subscriptions or medication where it's troublesome to go on-and-off.