First off, welcome to the wonderful and wild world of RP!
As you can see, there’s a lot of guilds recruiting, and most are more than willing to show newer people the ropes. Including my own guild.
https://us.forums.blizzard.com/en/wow/t/h-rp-firebrand-enterprises-hiring-for-2021/808907
There’s also a stickies thread in the forums with a list of RP guilds looking for more.
https://us.forums.blizzard.com/en/wow/t/wra-information-directories/651240/2