The last thing I want to do is discourage anyone from learning, but I'm afraid you're looking at this (fascinating) field the wrong way. To the extent that this is unlikely to be an interesting intellectual pursuit for you, as it's currently framed.

If you really do want to operate a business generating electricity, start by learning how the power market operates in your area. Unless you live off-grid with a high degree of autonomy, you're likely to find that there are zero opportunities for an individual to enter this market on their own. Providing stable power to the grid requires unbelievable amounts of capital, planning, compliance, person-hours, and way too many other elements to list here.

If what you're actually interested in is generating electricity for yourself or your community, the good news is this is much more approachable. Developing and operating small-scale off-grid renewable energy system for a small home is achievable with off-the-shelf components and a basic understanding of electronics. You'll still want an electrician to validate and perhaps perform some of the work, but it's all pretty basic.

If what you're actually interested in is spearheading a renewable energy campaign for a large community currently dependent on other forms of power, take a look at community solar programs and energy cooperatives. Both are in practice all over the US.