Training
I would split my training into two phases per day.
Weights in the morning and MA at night.
I train my body parts twice a week; but it is not likely to work for you since I am a mesomorph with artificial enchancers hehe.
(I know I will get better results if I train it only once a week but I do it mainly for maintenance, I do not wish to get bigger currently 99 KG 7% bodyfat 6 foot it is my fighting weight.)
I suggest you train one body part a day for six days a week, with MA at night, for example do a 4am work out before school and go to box right after school, that leaves you time in between and on Sundays to focus on your studies.
Example each work out is usually less than 2 hours average 1 hour; gives you plenty of time for other things and lessen over training.)
Day 1 Chest (Dumbell presses; I love it uses less of triceps and focuses on chest)
Day 2 Legs and Abs (Stiff leg dead lifts for hamstrings, and Sqats for quads and calf raises for calves, with hanging leg raises with weighted straps for lower abs, medicine ball crunches with weights for upper abs; forget obliques as heavy bag work will work it alot.)
Day 3 Back (weighted backpack chinups, Rows, rear delt parallel swings; why no deadlifs? we do them for lower back/trap days)
Day 4 Shoulders (Dumbell press; again it focuses more on shoulders and less on triceps)
Day 5 Traps /lower back(Very heavy dead lifts, can alternate with cleans too.)
Day 6 arms/biceps/triceps (triceps first as pump does not get in the way since one is push the other pull both will not compromise the other.) Curls and rope pulls; close grip presses.
Day 7 rest NO weights NO MA just rest and do your studies.
MA routine.
Well I am not a boxer (thaibox/wrestler) so I will just give general points.
Do skip ropes for warm up, learn to develope a pace to it.
Use the medicine ball, toss it back and forth twisting side to side with a partner, (USE A HEAVY ONE)
Find a good coach and make sure you give him feedback on what problems you have; if he is worth anything you will develope.
Listen to him, do as he says.
Finally your natural hormones at such a young age is very potent you do not need steriods as your natural hormones will shame even the strongest steriod; train like mad now as when you hit late 20,s the magic ride is over.........