1. EST (but not really limited by it too much, as it is a PbP)
2. Er... Way too much time on my hands
3. Multiple times per day, for sure
4. I have a good knowledge of the rules, but I've GMed once ever. I usually end up as a player, but I can GM after I see the flow of the group; I could also try my hand, but no promises on how good I'll be
5. Currently in 4 PbP games, not including this one, and have played 5e with my real life group on and off (they never can stick with it sadly)
6. I can make anything, to be honest. Anything is an interesting roleplaying experience, so I can fill out of a group, if need be.
I would also be glad to be in both groups, but if we want to keep players even I can limit myself to one. I definitely like the idea of parallel games, we can even coordinate plot threads (or other Evil GM stuff™).