No, I do not shower any more or less than before HRT.
I have never sweat a lot, and the times that I did it was pretty neutral. Now, I barely sweat at all.
I shower once a day, every single day (very very rarely do I skip a day). My hair doesn't bother me. I get up 3 (about) hours before I need to be anywhere so I have time to shower, do my hair, do my makeup, etc.
For anyone who is curious, I shampoo my hair twice a week, and condition regularly.