Cloth Diapering

So..... maybe I can blame my pregnancy brain... yes let's do that...so I want to do cloth diapers. I have "pocket diapers" I believe they are called... so my questions are,

do I have to use inserts, or can I just use liners?

If I use liners is it possible to use the diaper maybe like 2 times, while just changing the liner?

I know there is a cloth diaper forum but no one ever replies to me on there. Sorry.