Most Helpful Girl
I am almost 21 and I haven't really had a boyfriend, and about 95% of students who go to my school are girls, so it's hard to meet guys. I know situations that seem forced are really awkward, so tinder is probably not your best option, but I would recommend trying to just making friends with some of your friends girl friends and then they may introduce to their friends and then maybe you'll happen to meet a girl that you like, and it won't be too forced. I know it's tough, I was extremely shy for the longest time.
Most Helpful Guy
Be a regular somewhere. Whether it be a lounge, a cafe, a class, church, even workout at the local park. If you take a class together you already know you have a common interest so that's a plus.
There's apps like Tinder where you can make a honest profile so you're matched with people you match up with. That might be a little harder since girls get blown up with messages. So unless you open with a creative message your contact attempt will likely be ignored or overlooked.
If there's a cute cashier at a store you frequent you can find reasons to go back and eventually ask her out after flirting with her a bit.
You can go old school and go to a club or bar. But honestly you don't go looking for a girlfriend or wife at the club.