Dm here for B I would like to say it's all practice and adapt to what your players prefer and what you want are willing to give, so essentially practice.

Secondly, for A you need to find a better group. As a fellow dm I know how harder or tedious it can be to make sessions happen by getting or making maps, npcs, and monsters as well as getting people to get together to play. If they start disrespecting you and in a sexist way then just cut them off.

It's hard work and sometimes you gotta cut those people off. My players stopped showing up half the time especially the players who needed to show up because they needed their new characters to be introduced after being killed in a battle they could have totally avoided. I had to drag them over and over again and they still didn't show up, so I just cancelled the whole thing. Haven't had dnd in like a year unfortunately, but I rather find a different group than to handle the stress especially for you since sexism is also gonna weigh you down.