Give him raw shrimp, beef heart, worms, blood worms, and massivore. I have never had an RTC, but am going based off of what I fed my tsn
As long as you vary his diet he should be a happy camper with a full belly :}
Feed him once or twice a day. But really as long as his belly is full, he won't need anymore food for that day
turn the lights off, it'll help, when they are small they dont come out in the light that much. as it gets bigger it will become more active during the day.