Newbie questions

I know from golf that if you learn how to work on your gear, it makes the whole relationship with your equipment more intimate. I’m not a natural work-with-hands guy but I am persistent.

So I am about to jump back into cycling. And I want to be able to maintain my bike. I spent last night on YouTube seeing how to build a bike work stand. Next is: what basic tools do you really need to maintain a bike? I have nothing other than chain cleaner stuff. I’d like to be able to tune brakes and shifters.