Easy:
1st-Increase calory/protein intake (eat like a horse). You can use sups to help with that (pick a good protein, "simple" not mixed with other stuff like that bundles with creatine). As soon you get into BB phase take creatine and then when moving to rly heavy weights start with ZMA. You dont need anything more, (maybe multi-vit before breakfast).
2nd- PERIODIZED Weight Training- Stick to compond/athletic stuff (Squats/DL/BP/MP/Rows/Pulls/Dips/etc... You should start with an anatomical adaptation phase first the you could transition int BBuilding and MaxS phases (sets and reps vary greatly depending on wich phase you are).
You have 5 months right? Heres a simple plan:
AA - For the first 4 weeks transitioning directly to BB phase (2 to 3 days per week/ sets=2 to 4/ The weight has to be light (between 30%/60% of 1rm) /
reps=to light fatigue/ rest=1.5min/ "Circuit style")
Example: Squat - 1.5min rest - BenchPress - 1.5min rest - DL - 1.5min rest - Militar press- 3min rest. Repeat "circuit" 4 times.
Dont forget to make the sessions progressivly harder (more volume heavier weights but still in AA range)
BB - 3weeks BB/ 1 week (rest)/ 3 weeksBB/ 1week (rest)/ 3 weeksBB/ 1week (rest).
Time for spliting: Day 1 = Upper Body Day 2= Lower Body (4 days per week, rest on Wed and Saturdays and Sundays sets 2 to 5 / rest = 2min reps=20 to 8 depends weight sould be around 65% to 80% of 1RM. Lift the normal way finish one exercise then go to the next.
Example of 1 week: Monday -Upper B.
Bench Press-Dips-Militar press Rest=2min Sets=5 Reps=12 (around 75% of 1rm)
Tues - Lower B
Squat - Lunges - Calf raises Rest=2min Sets=5 Reps=12 (around 75% of 1rm)
Wed - rest
Thurs -Upper B.
Bent over Row- Pull ups- Standing Row Rest=2min Sets=5 Reps=12 (around 75% of 1rm)
Friday - Lower B
Deadlifts - Glute Ham raises - Calf raises Rest=2min Sets=5 Reps=12 (around 75% of 1rm)
Sat/Sunday-rest
Dont forget to make the sessions progressivly harder (more volume heavier weights but still in BB range as the weeks progress, example: week 1=2 sets at 65% and week 6 is 4 sets at 75%)
MaxS - Last month (last week=rest) 3 times per week "Circuit" style again but in pairs rest=5min reps=6 to 1 (85% to 100%) sets=3 to 6
Example: Squat-5min-BP-5min repeat 4times then DL-5min-Row-5min repeat 4 times.
Dont forget to make the sessions progressivly harder (more volume heavier weights but still in MaxS range)
Dont forget to warm-up properly :D.