I was actually curious if i could find my char anymore, i was sharing an account with a friend across TBC/Wotlk in highschool and gave it to him beyond that 10-12 years ago or whatever.
You can see the achiev here:
https://worldofwarcraft.com/en-gb/ch...lich-king-raid
To note that i was in a random guild.. don't even remember the name, but as you know, everyone in the raid needs to do their part to get it.
Also, regarding the restrictions, barring class which you pick at the character creation screen, everything is farmable and switchable. They don't have a 2 week farm period every time you have to switch them.
So you need some common sense to see the difference.
And all i see is that you're asking Blizzard to handhold you to get into groups, placing stops to other players to "lower" them to your level.
Don't worry though, this covenant locking business won't even matter, because you won;t get invited anyway due to your low experience. First people look at rio then what's your setup is.
Covenants are going to be an afterthought, 1 specific will be necessary for the mythic activation buffs, so don't expect to get carried just because you were lucky with your choice for the buff activation, rofl.