Re-establishing your balance is your next hurdle. Even before figuring out about contract law, or at least how to download your winner swag, you need to allow yourself the helium-like high of the win and then gently reconnect with the ground. You still have your friends and family, who count on you for an infinite variety of things. You still have your body to care for, your bills to pay, and your life to maintain (lawn, pets, vehicle, job). These will all help you stay grounded. You can only not feed the dog so long before you are once again scooping kibble. You may know someone who let their success turn them into a 'new' person you didn't like. You may feel intimidated by the successful people you have met. You may have never felt that kind of euphoric achievement before, its unfamiliarity leaving you feeling bulldozed. With that frisson of fear, it can be hard, but it is critical to remain grounded in your reality. Keep in touch with your friends, call your parents or whomever has been supportive of you all these years. Talk about memories and make plans. Share with them your feelings, and listen to their feelings about your new and marvelous reality. This is harmonizing, bringing you closer, giving you perspective.
If you're afraid of this success because it sets a new, hard to reach bar for you, keep in mind that you get to set your goals, they are yours alone. Set new, realistic goals that acknowledge your abilities and your fears. Talk them out with people you trust. Sometimes seeking out a mentor is helpful. Another local area writer, teacher, or professional in the field can be very helpful. To garner the information you need to move forward, think carefully (and ask others) about what questions you really need answered: do you need to get a lawyer? When do you need to deal with taxes for new income streams? Thinking things through with someone should help keep you connected without deflating your new success. How to handle life changes like this are very individual.
What we all hope for, that million dollar deal, may be as rare as the Hope Diamond, but there are lots of successes that you will experience. There is nothing worse than turning into a bad winner, except being so afraid of winning you don't take the chance.