I made a couple of mods and published them on Nexus, and with the donation programme actually made a little money from it, even though I didn’t expect anything. If you want to make money modding without completely shitting up the user experience you’re better off just shoving them on Nexus and maybe making a ko-fi or something.
I usually just breathe in as much as I can and hold my breath until I need another gasp of air. It usually goes away after two or three times.
Lying on your back and pressing your knees to your chest is another way to get them to stop that works for me.