Google Colpitts oscillator. probably best to start with a low frequency one to begin with (10MHz or so) then move to a higher frequency one later. I designed a 100MHz one a few years ago and used my radio to detect if it was at the correct frequency (we have a radio station at 100MHz - KISS FM for thos of you in the UK). Just make sure the FT of the transistor is much higher (factor of 10) than the frequency you want, then the gain of the transistor wont affect the performance