Need Help Forming a Cycle

I am 5’8.5 and about 170 lbs I have already completed one cycle back in March of Deca 250mg per week and Test E 250 mg per week. I gained about 20 lbs and quite a bit of strength. I got up to 197 and cut down to 170 on my own with a thermogenic, proper nutrition and cardio.

I am more cut and lost a little size I had gained. I am 23 years old and an aspiring fitness model/bodybuilder I want to gain a lot of size now but I will be honest I am inexperienced at this can anyone give me advice and let me know what I should do next cycle?

Whats the best cycle for gaining serious mass and strength? I would appreciate any help or advice I can get!

Thanks