There are many things you need to do if you want to get into the solar business:

1.  To become a solar installer you need to have many titles.  You need to be a combination of a roofer, electrician, salesman, designer, businessman, and a general "jack-of-all-trades."  Once you have accomplished these you can begin the process of starting your own solar business!
2.  To start your business check out the web, it's free!  Research these sites to help you out in the process: LSES, NABCEP, FSEC, NREC, and SEI.
3.  Take a training class on how to install solar.  Prices vary from a few hundred dollars to thousands of dollars.  Taking a class is a good next step, but don't expect to be a solar installer on completion of a class.  Classes are offered through FSEC, SEI, and NABCEP to name a few.  If you don't feel like flying to another state and paying for all those fees, there are in state training courses.  Click here to view the classes and sign up.
4.  Get an apprenticeship.  Existing solar companies generally like to bring on installer-helpers to help on sites.  It is more likely they will bring on an apprentice that has been thru training first.  You can learn a lot from being on site, things that maybe you wouldn't have been taught in a class, and definitely hands-on experience.
5.  To be a solar installer you need to obtain a commercial contractor license with a solar energy equipment sub-classification.  See this website Louisiana Solar Contractor License.
6.   Since you will be a business, check with your CPA on the recommended business structure you should set up.  Then you should register your business with the LA secretary of state.  See this website Louisiana Corporation Database.