Ignore requests from people who want to use your money to start businesses or those singing the praises of other grand schemes. Then car loans and possibly student loans would receive attention. Being free of debt after years of having such responsibility can be exceedingly satisfying.
People can learn about investments through courses, books or Web sites.
If you respect money, you will treat it in a much more responsible manner. Between receiving the windfall and reinvesting in your chosen investment vehicle, keep the money in money-market or mutual funds. Even if you can retire, a lot of work will have to go into managing the money. Life will return to normal sooner or later and your friends and workmates are likely to remember any slight, real or imagined, provoked by your good fortune. Appreciate your luck and enjoy it.