Ana Marie B. , Mike M. Provided a great read from @Sean Carroll on a high level process, but with everything out there, the devil is in the details. You can easily be more or less involved, and whichever you choose will significantly influence your ROI. For example, you can be fully hands off and less involved (meaning less ROI) and have an engineer/architect, interior designer, construction/project manager and general contractor do everything for you. OR you can decide to pick and choose what you would like to be involved with your project. The more you do, the higher your ROI. But the best and most invaluable part above and beyond your increased ROI is the hands on experience.
Bottom line, there is no right way to do things and sometimes what works for one investor might not work for another (you). At the end of the day, you need to explore different options and determine what you’re comfortable with based on the numbers and you’re desired ROI.
Full disclosure for flipping, we recently finished a high end project and it is very involved, a lot of work and not for the faint at heart.