If you are not confident then there is nothing wrong with paying someone else to get the job done, especially brakes
One way to build confidence is to take on some of the smaller tasks that even if you screw it up, it is an easy fix. Some of the things you can do are change oil, plugs filters,belts and get used to wrenching and then go from there. I am currently digging my own inground pool and i wondered what the heck i got myself into.Once i calmed down and cleared my clouded vision (and extreme uncertainty) i am positive i can do the job.
You can do work on your car.Tackle jobs on a lower difficulty scale and arm yourself with information on said task ( ie: ask FGF'ers) and take your time.If you get stuck or unsure post here in the tech help and never be afraid to ask questions.We are all here to support one another.Best of luck and hope you get her back soon!

David