From our experience a straight up vibe is a good place to start. Although you'll likely start with clitoral orgasms - if you get a toy that's insertable, you can also experiment with it as a dildo by simply turning off the vibes.
We got our first dual-stimulator when my wife said her orgasms are stronger when she has something to clench onto vaginally while having a clitoral orgasm.
After that we began to experiment with a separate dildo and vibe combination - which is what we do now. It works best for partner play - but I'm sure women can do it solo as well.
By using a separate dildo and vibe - you can combine your favorites, unlike a rabbit style where neither are optimized.
Enjoy the journey...