8 weeks of osta is close to useless, 4 weeks is completely useless. Whatever you choose, use a pct.
Your 45 years old, so there’s not as much worry in terms of long term suppression, since that’s a possibility for you a couple years down the road even if you don’t use gear. Considering that, I would still start with a safe compound, like a strong sarm. You could stack lgd at 20mg with yk11 at around 10mg. 8 to 12 weeks for cycle length. Don’t go beyond that. Use a test base as well. Dermacrine if you don’t want to pin. The bottle will tell you how many pumps of derm you need. It’s dependent upon the user’s weight.