I will try to answer all 6 of them
1. There is a discord server, linked to my Patreon page, but you need to be a patron.
2. I don't know if there is private messaging on itch, but you can contact me in private on my Patreon page: https://www.patreon.com/Exoterra - no need to pay to send a private message.
3. When starting a race or by pressing Esc when exploring with the MC in the menu you have an option called Graphics, there you can set the game to low, medium, high or epic and adjust the resolution scaling.
4. Both should be able to run it, but you also need a gpu and some ram in the computer.
5. Pregnancy is doable sometime in the future.
6. Don't know