I think maybe a motivator is that IMO, not finishing high school you'll have way more trouble finding work in the future unless you work extra hard. Plus, I think if you plan on going to college it's more enjoyable and you get to network with a bunch of folks. Maybe finishing to major in something you actually enjoy or are interested in will spark you finishing HS.
I met a ton of people who didn't finish school and more of them struggle than are successful. so i'd say finish that off at least then see what you wanna do after.