I started at 1.25 mg.
Finasteride is a drug that is nearly dose-independent. There's very little difference between 0.50 and 1.25 mg, only your wallet might notice a difference. Focus on building the routine.
If you really wanted to moderate the effects of finasteride, your best bet would be other drugs or creatine. Note that there's less experimental data on that approach so you'd be speculating.