I am nearly your age and just started TRT in Bangkok. There is an abundance of clinics to help you and get you started. Just Google it. Pulse Clinic is a popular chain brand, also Medconsult offers treatment, and Transcend Clinic is focused on it. But prices vary largely depening on the initial screening package they offer.
As it was told to me, the reason some initial screening packages can be costly is because the doctor needs to understand your overall bloodwork to see what are the causes of your low TRT. In my case, I get regular health checkups already, so I already know I am healthy. Therefore, I chose the screening package at Transcend Clinic, which was great value and cheaper than the other brands. My T levels were so low, there was no downside to trying it. I have no regrets. The results are amazing.
I recommend you follow a regular monthly testing program offered by the clinics until you know what your dosage and frequency needs to be. Then, you can decrease the blood testing and find a clinic that will help you do your own injections at home, with occasional blood tests. There are also, pills, creams, etc. available if that is what you want. I was happy with Transcend Clinic because the doctor provided all options to me, we review the lab report together, and let me decide what to do without pushing me in any direction.