I'm new to this game so I can help with some probably bad advice as its all still new to me as we'll!,
Temperature control was def the biggest headache for me.. My tip is patience and don't fiddle too much with the vents as it takes time for the egg to drop in temp and then get back up again. Was a nightmare for a while.
Also I found the charcoal is key . I got some from the garage and it was really bitty. The temp would get stuck at about 100 then all of a sudden "whoomp!" Sounded like something dropped and the temp shot up. I think nice chunky charcoal seems to work better. Sadly that's the super expensive egg stuff. Used big k as well which is ok. Also cleaning out your egg everyso often really helps
Recipes: ironically chicken is the biggest revelation in some ways as its so juicy. Jerk is great in my view. I bought BBQ university / bible by Stephen raichlan (?) . It's really good.
Also shoulder of lamb low and slow in tacos is very good plus ribs etc hope it helps!