Yep I know it's a non-answer but most of the "training" books and guides I've seen, are set up so you can use them with an HRM as well as with a powermeter, or even good old perceived exertion.
I'd also say the important thing is to strap it on and get used to seeing how your HR responds to exercise - within a ride, and also over time as you get fatigued from day to day, then recover, get fitter, etc. All the talk about zones and thresholds will begin to make a bit more sense.
Also be aware of the limitations of HR - lots of things can affect it and if you're a slave to the numbers, you won't be getting the most out of it. For example if you're fatigued it's harder to get your pulse up, but you may be going just as fast as you did yesterday. Dehydration, sleep, temperature, mood, all can affect it.