a couple of answers
1 Yes and observe
2 maybe until you get a better replacement. baby brine finely ground flake frozen baby brine Decapsulated bbs eggs there are many good initial foods. My personal fav is live daphnia when they are big enough.
3 Yes continue to do your water changes you do need to be careful to not remove fry. I recommend to move slowly while in the tank stay away from mom and dad they may charge you so stand your ground in that case and use a small gauge hose to siphon with. water quality must be maintained
4. depends i.e. I don't know for this specie but someone else on this list will
5) get a second tank ready either you will need to move mom and dad or the fry in order to grow them out.
And don't forget to observe them and enjoy