Well, first I'd ask them what their preference was. For instance, I can't use hard materials as it causes pain due to endometriosis and surgeries. Now, the soft jellies or silicones are perfect for women who have similar issues. They're actually a popular preference among all women. My favorite toy was the strap on clit vibes, but only Doc Johnson, the other brands were absolutely nightmarish! But that's just me. I'm still a huge fan of the strap on clit vibe. It's easy and very attractive, non-intimidating.
Also, I prefer slim ones and always have. I don't think a huge insertable toy is always a good idea for newer users or even some advanced. It's best to choose a decent size then work your way up.
I'd think a good one to go with would be a soft, maybe flexible clit vibe that is insertable as well. The rabbits are all wonderful, but not sure if there perfect for everyone. G-spot toys are good too, but I would definitely start out with one that's good for clit stim as well. You can get one that will do both.