Does masturbation in the morning ruin the rest of the day?

No: No disrespect is intended; you have asked what must be a difficult question. I very doubt that this squares with your own real-life experience unless you have some other concern about sexuality. A handful of fools and crooks try to frighten young people about growing up; if you've gotten advice from them, ignore it. Talk with someone wise -- pastor, doctor, even (!) perhaps a parent.