Should I start progesterone right away?

I’m finally getting my hormones! I’m gonna do injections, and my doctor said she’s comfortable prescribing me oral progesterone as well if I want it. And it’s a female hormone, so why shouldn’t I have it, right? I know it’s supposed to help with breast development, and maybe libido, but I haven’t done as much reading about progesterone as I have estrogen. Should I start it at the same time I start estrogen? Is it even worth taking? Would love to hear others’ thoughts and experiences