Just started T, when do you get your blood checked.

It was 150 news when you first script so I went to a concierge or whatever doctor he’s tied into a compounding pharmacy here he has over 60,000 patient. I have tried texting his PA numerous times. No response paid for his service and the cream same day. I have no other paperwork but at least I got the cream and I don’t know if I’m on the right dose. My Endo has no clue that I have it. He wrote it all Office visit paperwork that he was prescribing testosterone have not seen it in 150 days so I’m going ahead and now my question is when do I go and get my blood test? I do have paperwork line for my PCP and one is from him. The end of since I just started a T how long should I wait? appreciate any help!