I recommend you to try to get into computer development. Start with creating basic chips, and evolve further to make great creations! TPT needs more computer engineers!

That's why I advised to start with something simple. Begin with creating transistors to understand how they work, then try to make logic gates, then design a simple logic circuit, then a basic adder, and so on!

I started with making bombs. Then I discovered a technique on how to make planets, and now I have a city on fp. (Quartzville valley) you'll learn by experimenting. 

Possibly just make either stuff related to buildings (cities, spaceships with internal view, nuclear reactors, etc...) or make art of some sort (maps and the such) or terrain and stuff like that. also try experimenting with various mechanics to see what happens and then post it.