arimidex .5mg eod, not every day.
I'd run the hcg from week2. Stop it like 4 days before you start your SERMs.
I know we sound like broken records with the age thing, but honestly if you can build a kick ass base before using steroids then they'll make you look incredible when you do finally take the plunge.
Gyms are full of guys who started steroids too soon who'll never look much better than ok.