I put almost all my charges on my credit card. From a $1.50 bottle of soda to a $100 tank of gas. The bill of course gets paid in full every month. Using the card means I don't have to carry a bunch of case, and I'm afforded some minor degree of security should my wallet get lost/stolen/misplaced as compared to cash. I also get to "keep" my money an extra 30 days to earn a trivial amount of interest.
It's good for you to be thinking about these things, but getting a credit card is not a life-altering decision, it's just a normal thing like getting a cell phone or a pair of shows. How you use the card, and put it to work for YOU, it what makes all the difference.