First cycle planning

[TheProof]

Hello everyone
I'm new in this forum and just thought it would be a good idea to ask more experienced users for opinions/facts about my first cycle.

My stats:
Age: 23
Height: 6'1 ft
Weight: 173lbs
Lifting: 2.5 years, 3-5 times/week
Bodyfat: around 10%

I basically started lifting from nothing, I was 127lbs and pretty much looked f****d up, like a skeleton or something. I've worked hard and put my diet together, ready put whatever effort it takes to get to 200lbs of lean muscle. Still skinny, but I feel like theres not too much of gains coming my way naturally with the genes I have(yeah, I know, old excuse etc. but nevertheless, the truth)

So, to the point of this post, this is what I thought would be my first and pretty mild cycle:
10-12 weeks (Do you think 12 instead of 10 would make pct any harder, or would it have difference on the health aspect?)

Test E 250mg/week (divided monday/thursday)
Dianabol 20mg/day for first 4 weeks (divided twice/day)
Hcg 250iu every 4 days from week 3-10 (or 12)

Pct(after 2 weeks off everything):

Nolva 20mg twice/day for first week
Nolva 20mg per day for 3 weeks
Tribulus after all that (does it have any effect?)

I was planning to do this cycle during summer, so plenty of time to make changes. What are your thoughts on the age, do you think there's a big difference between starting 23y/o or 25?