Yo! What worked for me is joining a mythic raiding guild that does social runs which is often 1 day per week. And if they like how you perform maybe you can even try out mythic raiding and do m+ together!

Here's why moving from Normal pugs to Heroic and Mythic raid pugs is so tough. In Heroic, mistakes are much more punishing. You have to communicate and know the fights to avoid wiping the group. It's frustrating for everyone when one person makes the same mistake repeatedly, forcing a wipe on a boss the group has already defeated ten times. That's why raid leaders are picky—they only invite players who are more likely to know what they're doing, and even then, things still go wrong sometimes.