My Routine Is almost done, one last thing, hiit in morning, weights at night?

My Routine Is almost done, one last thing, hiit in morning, weights at night?

i am 5'7, 14 years old, still gotta litle tub (want the abs to show)
ive been lifting for 5 months seriously, i diet well. i own a heavy bag and lift weights and have an elliptical all in my house

can i do 10-15 min of hiit in the morning 5x a week on my 5 day training split? i weight train at night in my home gym, and have an elliptical i wanna do hiit on in the mornings.

My split:
Monday: 15 mins of hiit in morning, Chest and triceps and abs at night
Tuesday: 15 mins of hiit in morning Biceps And Back at night
Wednesday: 15 mins of hiit in morning Legs and abs at night
Thursday: Boxing ( I WILL NOT DO HIIT ON THIS DAY, this is enough cardio itself)
Friday: 15 mins of hiit in morning Shoulders, and a few compound lifts like bench press and deadlift. at night.
Saturday: Hiit, abs in the morning.

i also have football 2 hours 5x a week but its literally standing around watching our coach put in plays, then we walk through them at 3/4 speed lol.

is it ok to add in 15 mins of hiit in the morning 4 days a week? Maybe 5 if i do it on a saturday?

also what should i eat b4 hiit to ensure it burns fat not muscle, and after? I dont have whey protein so don't say that. today after hiit i had

1/2 cup yogurt, 1 and 1/2 tablespoon peanut butter, 1/4 cup fat free milk.
is this ok?

My hiit routine:

Warmup, one minute.
sprint 30 seconds, rest 45, sprint 30, rest 30, sprint 30, rest 45, sprint 30, rest 30 all the way till 10 mins or im dripping in sweat and can't go anymore.