It takes a LOT more than liking cars. You'll make crap money, as commission sales are all but gone. Car sales requires no LESS than 60 hours per week. You'll need to put every waking hour into your job. For the first 2-4 years, you'll rely solely on floor traffic. You need to know a little about the cars you sell. However, you need to know a LOT about the sales process, and the psychology of the sale. Most customers don't care that an engine has 200+ hp, and a 0-60 time of 7 seconds. They care about their hot buttons, and payments. Where you go with the sales process depends on the customer's state of mind at any given time, and only experience will teach you that.
You'll be hired to bring in your friends and family, and maybe sell a few cars. The managers really don't expect that much more out of you. If you're relying on fresh ups, you're already done. The majority of salesmen are out of the business within a year.
Senior salesmen have spent years developing a customer base. If you're going to make it, you need to start marketing yourself in new and unique ways. Don't drop your cards in a fishbowl, or pin them to a bulletin board. Take them to places where you can get some customers in. Try mechanics, body shops, and insurance companies, Get a Facebook set up, and put a picture of every customer you sell. Share videos on social media. Pay a few hundred, and get yourself in the paper (with your picture). Offer bird-dog checks for referrals. Be unique.
A good salesman isn't the best person with word tracks, it isn't the slickest person, it's the person who relates to, and builds rapport with, the customer. Be honest, and be real. DO NOT LIE. EVER. Don't use the same approach with every customer. Last, and most importantly, FOLLOW UP with everyone. Be creative with that as well. Send a birthday card for the car's one year birthday (the customer too, of course, but that's played). Make sure they remember you.
My advice? Stay in school...
18 years retail auto sales experience.