i have a pretty good knowledge in computers
Make tutorials on how to run computers, or join as an apprentice under a reputeable manager on this forum.
and i bench 80 kilograms at 18 years old
Fitness channels are like a cesspool on youtube but go on add to that if you want. Keeping a healthy body is important on its own too.
and i have a lot of free time
Why? You parents pay for all your bills?
if anyone need some help or someone to work for in anything let me know and ill teach you how to look lean in 6 months
Go on make a youtube channel about fitness and I am sure you will run out of steam in a week or so.
Dedication and consistency are needed for earning money mate. Good luck on that.