Armidex acts to increase your natural endogenous testosterone, the pattern of hair loss on head is in keeping with male pattern baldness and is associated with change in androgen levels.
Although armidex is still relatively new in the treatment of low testosterone, it is felt to be superior to testosterone replacement in the older gentleman. After three months, you are starting to see the benefits of armidex on your testosterone levels and blood tests will confirm this. It is still unclear as to how the external impact of these changing levels will manifest in the indivdual however it is considered that normal age-appropriate levels should be obtained.
Your other alternative is a testosterone supplment such as testosterone gel which is applied to the skin, this is an external source and has complications of impact on blood disorders and enlargement of prostate. I would suggest that you persist with the armidex for the time being, and discuss your worries with your endocrinlogist.
Regarding the weight loss, do make sure that you have 30 minutes of brisk walking every day, and calorie controlled diet of 1800-2200 per day intake.
It is the increase in endogenous testosterone which is having the consequence of hair loss, this is a feature of secondary sexual characteristic which would have been natural to you if the testosterone had not been low for many years. There are products which may help(minoxidil) but these are expensive and need to be used long term. Also any growth is quickly lost on discontinuing the products.
What was your father's pattern of hair loss over the years?
This will not in itself transform your body structure without careful toning and weight lifting. You should make sure that you are under the guidance of a physical trainer to maximize your response to this drug.
Bearing in mind your age, you will find that your overall response in terms of physical characteristics will be less than if you had started the drug in your early adulthood.
At the moment studies of the use of this drug in men are quite limited, there has been reports of changes in LDL levels, and slight increases in PSA but information is not available as to the long term impact of this.
I would recommend that you attend regular health screening tests as part of your ongoing follow up. Reduce your other cardiovascular risks (diet, salt, blood pressure etc) as much as possible.