As a long time caretaker of a small feral colony, my best advice is to channel your resources into the kitten and the colony you're already helping. If you spread yourself too thin, you may end up not really helping anyone very much at all, including yourself. There's lots of information on managed colonies available on this forum and other sites. Learning how to make your tribe a managed colony is the best thing you could do for them, your community, and yourself. Kudos to you for caring, and I wish you all the luck!