Joining the HVAC field

I’m thinking about joining the HVAC field in the next 1-2 years. I already have my EPA Sect 608 certification, and I’m working on getting my NATE certification. I’m just posting here to get an idea of how the progression goes and how it all works. Any advice that would give me an idea of what I’m getting into would be greatly appreciated. I know it’s a lot of troubleshooting and technical problems, which is why I’m interested. I have a mechanical background from working on cars and going to tech school for it and from being in the military working on aircraft. Any advice would be greatly appreciated, and any insight on if this would be a good field for me and what the day-to-day is like.