Real Estate Courses?

[J B]

Im going to be taking real estate courses this summer such as,

1. Salesperson license
2. Broker License
3. Investment properties, Foreclosure & Management
4. Introduction to Real Estate Finance and Investing
5. Real Estate Finance and Investment
6. Investing in Cashflow
7. Buying and Selling New York Residential Real Estate
8.Investing in Multi-Family Residential Real Estate
9. Evaluation of Real Estate Investments
10. Learn About Real Estate Investing

Most of these course are 8 hrs (9-5) one day. Is there any that i shouldn't worry about taking, or any courses I should consider? I want to get into wholesaling and later flipping homes.
And also starting June or July the salesperson courses will be changed from 45 hr to a 75 hr course, does anyone know why?