How can I motivate myself to go out and live?

Im a 16 y.o girl. I like going out by myself and just wandering around looking at other people or what they're doing, and see places other people see everyday. I like observing things around me, I don't want to go out and go to a fancy place or anything, I just want to go somewhere new. Probably one of my favorite days was that day I went out to a random park to draw, I just love seeing people live. Except I'm not real too motivated to get out of the house, even tho I really want to It's easier to sit at home and play games. So how can I convince myself to go out more?