That is a multiplier based on a PLL, certainly.
But it's a clock multiplier, and "clock" implies digital electronics and square waves. You are needing an oscillator for ham radio. Oscillators for radio involve sine waves, not square waves. Sine waves are smooth, undulating waveforms containing a single radio frequency. Square waves have sharp sides and flat tops, and contain dozens of radio frequencies, many more than you would believe. (Yes, it is
possible to convert a square wave to a sinewave, but for this you need another PLL arrangement, and to get a pure sinewave is not so simple.)
I think you should look for a ready-made transmitter that has been designed exactly for what you want, or at least a published circuit specific to what you need. There must be plenty of people in the same boat as yourself. I'm sure you'll find an overtone crystal oscillator designed for the bands you will be licensed to use. A crystal oscillator means that the frequency is tightly fixed so you cannot* accidently transmit outside the ham band, perhaps causing havoc. "Oscillator" means it produces a nice sine wave (providing it is working properly, of course).
Your first transmitter should be simple to understand and low-powered; it should not be your own design. RF circuits often need a lot of troubleshooting and tweaking to get them operating properly, and for this you need test equipment, patience, and an experienced mentor to guide you.
Have fun!