so most of the guides that i have seen are mostly with mechanics and stuff that are probably +12 keys or +10 and the content creators dont explain which mechanics wont be applicable for m0 or lower keys .
is there any content creator or website that covers m0 and lower keys or any other thing that can help me with it .
ty in advance :3
The mechanics are all the same in mythic. No matter the keylevel. (or even no key)
I see .Ty .so only difference is the mob and bosses doing more damage and maybe affixes at higher keys?
Yes 
Basically just scaling in damage and healthpools. And some affixes.
Yeap pretty much.
The higher you go, of course the better the gear you’ll need to have. The players you’re with will need to be the same in terms of having good gear, but also the class line up will need to be more thoughful and not just “zomg lets get 2 rets they pew pew” for example.
My advice is if you have friends or guild mate, try and work with them to get your keys done. Trying to get into a pug groups can be frustrating due to waiting because for hours you may not get an invite due to delisting or declines for whatever reason those individuals may have.