I would say start with protein, Not sure what your goals are but based on your goals depends the protein you get. Then after 1-2 months you’ll see a difference but feel like you hit a plateau. Then add pre workout, will give you the boost to push harder. Then if you want to bulk up, 4 months down the line, add creatine. By the 6 month mark you will see a big difference and you won’t need to be motivated to go because your body will feel the need to workout.