Danford50 wrote:
being new to a class c , when I boondock and using the generator , with the generator will I be able to use everthing, such as the ac, lights, and the micro mave at the same time.
That depends on the generator and on what all everything is. In your case I believe you have a 30A electrical panel and an Onan 4000W generator, so it will be able to power things pretty much as if you were connected to shore power. (I found the 2018 specs for the model online, and am assuming they aren't much different from 2017.)
With a 30A electric setup, you can definitely run one high-power device at a time, and generally with a bit of care run two. High-power devices include the air conditioner, the microwave, the water heater electric element assuming it has one, a hair dryer, most electric coffee makers, a toaster, etc. Trying to run three of these almost certainly won't work; you'll trip a circuit breaker, probably the main 30A breaker.