I'm looking at the possibility of doing a teaching job which is what I'm passionate about and use my remaining free time to focus on my crypto and other online stuff that I'm into. My issue with this is that some schools can be engaging and might not give me breathing space to face other stuff.
You mention some schools then there are other schools that will not demand more time so you can focus on your other so why not look for other schools that are not time demanding I'm sure there are, so you can find time to focus on your online and Crypto stuff, teaching is your passion and Crypto is your interest if you have the right time management you can do both, we have other members with offline job here but they can still manage
2. The other option I'm also considering is that, since I have basic experience in graphics, and also have little tech knowledge, I can start up a computer institute where I will focus on training young teenagers on the foundation of basic computer operation, graphics, some tech-related course and also use the working environment to conduct private lesson for them. My issue with this option is that there are people already using their cafe for computer training in the area where I intend to start this business so my fear is how best I can manage the competition although I have a unique idea that is different from what those existing cafes are doing.
If your idea is unique then people will go to you, there's always competition in every industry and interest, competitions are here to challenge us make us better, and improve. If your idea is really that good and unique I don't think you will have a problem with your plan, people love and support unique ideas
I did not pick any of the two options you presented it's you who should pick what's best and suited for you because, at the end of the day, you should do what you love doing.