How do initiate a makeout session?

This is the first relationship I've been in and it's nearly a month since we started dating however other than hello and goodbye kisses, I've never actually made out with her. I'm pretty bummed down by it because I feel pretty weak, I'm just scared I'll do something wrong and don't want to mess it up. I'm also very awkward to the point When I meet her I find it hard how to hold hands with her without being obvious.

So how do I know when it's the right time to makeout and how would I initiate it?
How do initiate a makeout session?
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