Need help with joining a guild!

Hello!
I have recently started playing wow a bit serious then before but i am still a beginner. I have always wanted to join a guild so I could makes some new friends that can help me improve in wow and be able to do raids. I just recently reached my first lvl 80. I went to join a guild but then suddenly realized this is alot more complicated then what i had expected. Apparently they require a lot of things like for example gear score, mods, dkp ,discord, gear good enough for heroic dungeons and so on.
If i am going to be honest i dont know what any of these are and my gear is not good enough to join heroic dungeons. So now I am wondering where should i start, i mean i am trying to get good gear by doing normal dungeons but i barely find anything good. How can i gear to be able to join a guild?
Also is there any guild for normal players i mean most of the guilds that i find are for those who are professional wow player who have dedicated alot of their time on wow.

Thanks for the help!