1.What size crickets do i feed them?
you can attempt to feed them 'pinheads' or 'small' crickets but be careful when buying the small variety cause they may have ate each other meaning u might have some woodie sized crickets in a box labeled 'small' ; avoid feeding them the giants
2.How often do i feed them?
once a day in small amounts, or a bigger meal once every 2 days.
3.Do i feed them after their first shed of before?
you can attempt to feed them before first shed, but dont be surprised if they do not eat before there shed but i have heard of them sometimes eating like pigs before there first shed. But remember never to leave a cricket in with a shedding animal or any animal for a long duration of time, as crickets will bite the animal