well, from my expirience in tech, you dont have to know much, but you have to be with someone that knows alot. if you get job where someone is willing to take you under his wing, you will learn almost everything thats most companies need from techs.
mostly when company needs tech its for fixing pc's, printers, installing network cables, modems, working with servers (which is kinda advanced, cuz you could make multi million dmg to company if you fuckup something), or if you work for company that takes jobs from customers, its mostly cleaning laptops/pcs/ps/xbox etc, which is easy once you do it few times, or assembling pcs. thing is, as i said, you cant rly learn that on youtube, you have to work with someone that already knows what he is doing. if you find that person, you could do it all solo after 1year
if you get that 1 year expirience, its rly chill job. like company can be satisfied with you working 5h on something, but in reality it took you 1h, and 4 hours you are just chilling pretending you are working
and yeah, if you arent already familliar with any programming language, its going to be hell for you. not impossible, but rly hard
(sorry for editing so much)