Just recently got back into working out. I’m trying to lose about 20-30 lbs but also gain lean muscle. Needing workout routine recommendations and some diet recommendations?

I’m 6’3” and currently weigh around 215 lbs. my goal is to lose around 20-30 lbs but I want to try and turn it in to lean muscle as quick as possible. I’m mainly just trying to figure out how much cardio I should do weekly with my strength training? Also trying to find the best type of diet? Any help would be appreciated! Thanks!