Hi, Jaime. Welcome to DC and it's so nice you are interested in cooking. It's a great hobby and can be a satisfying career.
I remember being 19-years-old. However, I was newly married with a 4-year-old stepson. Should have been a daunting scenario. Wasn't because I'd been cooking since I was 8-years-old. Out of necessity/responsibility. That's another story.
At any rate, don't let cooking intimidate you. Enjoy the process and learn from your failures. You'll have them. That's when you call out for pizza.
Read, make notes and ask questions. This is a splendid place to ask questions. There are NO dumb questions. Just the ones you DON'T ask. Everyone was at the beginning at one time.
Learn where your weaknesses are. We all have them. Even Julia Child did and she admitted it.
But, the best advice I can offer....have fun. Don't sweat the small stuff.