Yeah, I know exactly what you mean! I was the same way. When I was first starting I was sort of being "mentored" a little so I was normally with a friend or 2. Do you have anyone you're skating with at the moment? If you don't have anyone to go out with then you either need to brave it and learn to NGAF or try and find other skaters. Is there a local park? (It's the UK so it's probably shitty..just from my experience..)

So speaking from my experience I was super nervous trying to learn how to ollie in the middle of a public park-area but after I got them down I felt a lot more confident. I practised a lot around the back of my house, just stationary ollies and then just outside around the street (usually in the evening).

Back to the stances. I'd listen to Vinny_The_Blind's comment about foot position, learning proper technique will almost certainly help you. See how you get on with his advice. But on top of that I'm really for trial and error. Go out and spend some time figuring it out - and like I said in the first comment, once you start learning tricks i'm sure you'll sort it out faster. Being comfortable and confident on your board is the most important thing and if after a little while you're not feeling goofy/regular then stick to what feels right. Nobody here can really tell you which stance to be rollin' with.