I’m unsure if you’re willing to change faction or server, but in case you are my alliance guild would be more than happy to take you on. We’re a casual social/raid guild and have very low pressure normal and heroic raid nights every week, along with other events such as M+ nights and mount farms.
Here’s a link to our recruitment post in the new player forum, but along with being new player friendly, we have many old school wow players as well who have moved past our progression raiding aspirations and just enjoy having a laid back time with the group. Contact info is in the post.
Again, this is an ally guild, so if you don’t feel like swapping factions I completely understand. Doesn’t hurt to reach out though 
https://us.forums.blizzard.com/en/wow/t/new-player-friendly-guilds-check-in-here/903/164