New to using starter

Hello,
I’m new to using sourdough starter. I have breadtopia starter and fed it a few times. Question 1: Should I feed it and let it rise right before i make bread? 2: how long can it stay in the fridge without being fed and still be good to revive?

Excuse the quick reply. It is late here and will answer any questions you may have at the first available opportunity. But to quickly address your points…

1: Yes!
2: Depends on the starter. A good rule of thumb is 1 week and it should be fed come what may. Any longer and give it more TLC to come back to good health before using.

How do I revive it? I haven’t fed it in at least 3-4 weeks

Give it a good feed and do not feed again till it has matured and bubbled up. Give it another feed or two then use.