Should I buy a vibrator?

I'm 21, (mostly) a virgin, and single. I'm sooo lonely sometimes and miss having someone to be intimate with. I'm not very good at masturbating (is that a thing? To be bad at masturbating?) and I would really like to be more in touch with my own sexuality before I bring another guy into my life in the future. I'm considering purchasing a vibrator but I honestly have no idea what kind to get or if it will even do anything for me since it's so hard for me to make myself orgasm as it is. Any tips for buying your first vibrator? Is it a bad investment for a frigid lady like myself?