relax…you do not have to pvp to get into dungeons…just keep questing, you’re gonna gear up from the quest rewards there…it’s very linear and will gear you up for normal dungeons.
then it’s the formula wow has always been - gear up in normals (if you despise pvp) and then enter heroics…after heroics do mythic 0’s…you’re gonna make it through this 
if you want to learn your class naturally without youtube, and you’re struggling in game - i’d join a guild or ask for help on forums/in game…
you aren’t falling behind…and if you can’t do normal dungeons, you shouldn’t even be thinking about mythics right now…