Alpha~
To the title question of things you need to know, I can share my few pointers:

If you fall, don't stick your arm out. Curl and take the hit. I have seen and heard of people doing more harm to shoulder and elbow trying to catch the ground than just taking the hit on your side.

Give yourself more leeway in the rain. Mine (Look Quartz) get sticky in the wet and grit, and you need to plan more time to detach.

Most people have a preferred foot to unclip, but get used to doing both. Practice. I always unclip the left, and my three falls have been to the right. They all had different outside influences (rain, car stopping suddenly, and alcohol) that forced me to an unpracticed weak side.

As you are approaching a stop, unclip before you have to stop. I will do my poor imitation of a track stand with a foot unclipped just in case.

And I have no idea if they make you faster (I THINK that they don't), but I think they let you take all mental energy away from keeping your feet on the pedals and just concentrate on what you want to concentrate on. I am a huge fan.