Which is the best?

I have a couple odd? questions

I'm 21, I'm not a virgin but I don't have a man & don't like inserting my fingers into myself, will a vibrator be a problem for me?

If not... what's the best vibrator to get for a first timer?

I'm kinda scared to get one, i still live with my parents..

But I rather have something that pleases me that I don't have to worry about STDs (I always have safe sex) or the guy leaving me.. I have a high sex drive and it's driving me nuts.