The math is actually pretty straight forward. It’s just hourly rate x credited hours worked. But ultimately pay will vary based more on other factors. Most notably based on if you’re in a junior base and can hold a line vs a more senior base meaning you’ll be on reserve longer.
Reserve can probably expect the min pay of 73hr plus you can probably add a few extra hours (2-5) for unused shortcalls and field stand-by assignments. You may be able to aggressively pick up flying (allowed the day prior, if not previously assigned a trip) and earn enough credit hours to break the 73hr min but again that depends on availability of the Base/Equipment you get initially.
The sooner you can hold a line the quicker you’ll be able to make more money depending what’s available in your base/equipment bucket and on how much you wish to work (sounds like you’re willing) and how well you learn to use PBS (our scheduling/trip trading system) to trade and pick up trips.
Narrow body (737 or 320) San Fran and Newark are probably your best chance to get a line the fastest.
Hope that helps you figure out your situation. Good luck