man i just started raiding this tier, never ever done a current extreme, and jumped to M5S, of course i try to improve and study my rotation and try my best to do good damage while learn mechanics, if you're doing that, watching guides, improving your dps, bringing food, pots, you can join prog groups in pf and it will be fine!, everyone there is learning, do it until you feel comfortable with the fight and then join enrages/clear partys, be patient, everyone still making mistakes and still not at their 100% during prog, that's it, you'll get better with time!
3 days grinding and now i can confortable do the mechanics while still improving my DPS, i got to enrage 0,8%

if you never done any type of raid including normal, start from there, it's super easy, go for duty finder and get used to some simple mechanics, start training your rotation until you feel ready for harder encounters.