I started raiding as a newcomer as well, about 4 weeks ago, so maybe my 2 cents are helpful:
1. I wouldn’t worry about being colorblind on Vale Guardian or Gorseval, those are usually the first bosses newcomers will face. VG has green circles (4 ppl need to stand inside or everyone dies) but their shape/outline is very distinct from other things on the ground.
Moreover, squad commanders can put icons on the map (heart, star,…) so if u tell them that green and red look the same to you, they can easily put an icon onto the pillar you need to run to during the split.
2. You definitely should look for a raid guild, there is a reddit forum where I found mine. Many are willing to integrate newcomers and teach them, just apply to a few. (https://www.reddit.com/r/GuildRecruitment)
3. Join training runs, some are infrequently posted in the raid section of lfg, some via forums and people use them to get to know the mechanics. Most likely, none of these will kill the boss but it’s a great way to learn the mechanics so that you are a little prepared for when you join a potential guild the first time.
4. While some scepticism against metabattle is useful, the message of raids and the builds posted there is (imo) very valid: Life gets a lot easier if you min-max.
In my opinion, you should figure out which roles druids occupy in teams (usually healing or dps-support). While all druids have an easy time buffing (pop glyphs, use frost spirit & spotter), our other duties benefit a lot from dedicated gear.
If your job is to deal condi damage, then grab axe/torch&shortbow, acquire sinister trinkets and possibly a viper amulet and use appropriate runes on your condi armor. And if you are supposed to heal, then grab a staff and again appropriate sigils/runes/trinkets that specifically empower your healing.
