Welcome!
The gals on here are full of great information! Some are full-timers, some are part-timers and some, like me, are still dreamers.
If you get road-side assistance (Good Sam offers that, as well as other places) then you will be covered for break-downs. Some things you can/will learn to take care of on your own (preventative measures as well as after the fact problems) as you go along.
There are also many ways to save money on a tight budget while on the road, as many of the gals on here do. You can workamp along the way if needed or boondock part of the time, etc.
You will get lots of answers and opinions on here, so ask away! Do you have any pets? We love pets!