Here's the thing sexy, if you put it off, you'll get shy and flustered again, and then say you'll do it the following time, and get stuck in that loop. If you never take the first step, then you'll never get to enjoy it and instead just be left with regret of never trying, of missing out.
Everyone here has suggested a really reasonable method for you to take a tiny step into this, but if you don't actually do it, then it's no progress at all.
So I challenge you, try it right now. Either take a pic now of a nip slip or the top of your slit peaking above your pussy, or rip the bandaid off fully and do a topless tits pic.
As soon as you do the first one, you'll be able to get past the embarrassment, realize that it was actually pretty easy and fun, and it'll make it way easier to have fun and enjoy yourself next time.
So go ahead and do it. Post a reply with a fun pic like what's been suggested. I bet it'll turn you on too thinking about how many others you'll be turning on with it.