2iu before fasted cardio in the morning and 2iu before bed 5 days on 2 days off, you are gonna need to do this for 6-12 months.
i would check your fasted blood sugar with a glucometer twice a week for the duration of your 6-12 month cycle as GH affects your insulin sensitivity and raises blood glucose levels and if it gets too high you will need to look at adding in insulin to bring that down.
for max benefit, add testosterone at 2mg per KG per week, and ride that TRT and HGH out for 6-12 months to see your benefits.