One of the best ways of remembering mechanics is being on comms. Whether it's Discord or something else. Being able to speak to your group (and they speaking to you) can make all the difference as they tell you mechanics and buff windows etc. A simple "I forget what happens next" on comms and you quickly get back on track.

If you're doing stuff with randoms, then try finding an FC or static that is willing to help newer players (even if you're not new) as they will be willing to guide you.