What about the Iconic Bullet?
Or would you prefer to keep it under $10? (The Iconic is $15.99)
I put together a really short comparison here: link
of a few small bullets that would probably make pretty good starter toys, depending on your price range. (With double points this week, it might stretch your budget a little further
As for using them, with a little practice you'll figure out what you like. You might like a little vibration on your nipples, around the outside of the vulva, around the inside of the vulva, and eventually around the clit. Some women really enjoy vibrations around the urethral opening too! Just take your time, focus on what feels good to you - there is no right or wrong way to enjoy yourself!