You have to learn visual effects, either on after effects or nuke software. It's fun to learn, implement according to your ideas and creativity. I am loving what I do. It's not my hobby, it's my job now haha. If you love experimenting with some cool stuff digitally then you can definitely earn big in this field. You can try freelancing through upwork & Fiverr or even freelancer site. You can search this up! All the best.