If this is all new to you, you have to realize the learning curve is a mountain the size of Olympus Mons. You have the vector graphics end. You have the cutting software end. You have the cutter itself with blade height, tracking, serial drivers. You have wedding and masking. Then you have the application. All non-trivial.
All this might not be a problem for you, but I think many people find it is not something they can order, receive, assembly, connect, design, weed, mask, apply in a day or two. Weeks is more likely, starting doing small jobs and working up.
The best way to conquer this particular mountain would be to find someone doing cutter work on vehicles and convince them to let you watch for a few days. Nothing makes you want to punch a hole in a wall like a failed cut job, eating material, or a failed application that you have to do over from scratch.
I hope I have not sounded like I am trying to disparaged you, I just have been through it and not with eyes wide open. If it is not new to you, I hope you kick its ass.