indicate if they are newbie friendly.  That is, IMHO, your best bet.  As a newb, you are not likely to get much help by asking here.  Suggest you read the self help center also.  Lots of girls ad on backpage, but you takes your chances there.

LLAP,
Swim

Do your research

Always do your research before contacting a lady. We write the info on our sites (at least I do) to answer questions and get to know us more. You want to trust the lady enough to send her verification info
If you don't feel comfortable sending verification info then you shouldn't be playing around
It's also a red flag for me if a person doesn't think my safety is important too
Providers have lives and families too we want to be safe and have fun just like you!
There is someone for every one and more!  
So start searching have fun and good luck xo

Check out my profile, Jade