Ellie-Belle

I'm 30 and looking to buy my first vibrator/dildo but I'm not sure exactly which toy would be the best. It's embarrassing to admit but I'm also a virgin, I pushed relationships and sex aside after an engagement fell through and I was told I more than likely wouldn't be able to conceive due to severe endometriosis. Lately though, I've been trying to find something that will help me get used to penetration because I know I will have some pain because of the endometriosis. What toy would be the best? Any help or advice is appreciated.