The hairloss issue - anyone with good knowledge?

Not started T, so I have not had a chance to ask a doctor about my options. But while I wait, I cannot help but worry, or wonder...

So - hairloss. There is Minoxidil, Finasteride, and so on... But tell me a bit about DHT "blockers", would that counteract any t-injection or slow it?

Feel free to treat me like an idiot; I would really like some clarification on the matter of what options there are towards hairloss when getting on t and what I can expect.