@Clara Brashear ,
Hi Clara,
I assume you mean how to be your own General Contractor hiring/managing/paying subs on your own work site and not swinging a hammer yourself.
Going to work for some one else in this field would probably take several years to figure out all that needs to be done.
For instance, material and labor lien releases, payment schedules that CYA, interim and final work inspections, etc...
You will also need to know how to specify what a trade must do in writing to avoid under-work and over-regulating them.
Tradesmen can be rough talking and rough personalities at times, and you also need to be able to stand up that and push through and get the job done.
This is something you can probably do, and you may be able to learn the basic outline of it online from various sources before jumping into it yourself. Then once you learn that, you could kind of consider yourself as having training wheels for the real world of doing it.
And as others have said, if you intend to do this for others you will need to be licensed.
Also Bigger Pockets has a book about Rehab called The Book On Estimating Rehab Costs that you might enjoy.
Good Luck!