Get a notebook and a pen.
Now go on YouTube and google.
Everytime you want to train, try a new workout routine you found online.
Or build your own. Follow the basic principles. Train the muscles you want to grow. Train them enough. Sets, reps, volume, frequency, variety, time under tension.
Log your workouts in a notebook. Try a new machine at the gym out. Look up good exercises. Try a new warmup. Stay evolving, push hard, and find the right workout.
With that being said....
5/3/1 variation for powerlifting, also conjugate method variations...
Chris Bumstead workout split for bodybuilding is great, gold standard stuff.
So is Layne Norton PHAT
Here's Chris' split
You can always Google how to do what exercise. Focus on ROM and squeeze. Really solid split.
Day 1: Chest
Incline Barbell Bench Press: 4 sets x 8-10 reps
Flat Dumbbell Bench Press: 4 sets x 8-10 reps
Weighted Dips: 3 sets x 10-12 reps
Cable Flys: 3 sets x 12-15 reps
Push-ups: 3 sets x failure
Day 2: Back
Deadlifts: 4 sets x 6-8 reps
Pull-ups: 4 sets x 8-10 reps
Bent-Over Rows: 4 sets x 8-10 reps
Lat Pulldowns: 3 sets x 10-12 reps
Seated Cable Rows: 3 sets x 12-15 reps
Day 3: Rest
Day 4: Legs
Squats: 4 sets x 6-8 reps
Leg Press: 4 sets x 8-10 reps
Romanian Deadlifts: 4 sets x 8-10 reps
Leg Extensions: 3 sets x 10-12 reps
Lying Leg Curls: 3 sets x 10-12 reps
Standing Calf Raises: 4 sets x 12-15 reps
Day 5: Shoulders and Traps
Seated Dumbbell Shoulder Press: 4 sets x 8-10 reps
Lateral Raises: 4 sets x 10-12 reps
Bent-Over Rear Delt Flys: 4 sets x 10-12 reps
Barbell Shrugs: 4 sets x 8-10 reps
Face Pulls: 3 sets x 12-15 reps
Day 6: Arms
Close-Grip Bench Press: 4 sets x 8-10 reps
Standing Barbell Curl: 4 sets x 8-10 reps
Skull Crushers: 3 sets x 10-12 reps
Hammer Curls: 3 sets x 10-12 reps
Tricep Pushdowns: 3 sets x 12-15 reps
Concentration Curls: 3 sets x 12-15 reps
Day 7: Rest