Ask for advice. No one is an expert on every subject. If you're in over your head, get input from someone who's more knowledgeable. Add structure to your life where it's needed. Disorganization is the source of many worries.
Structure provides security and enhances self-confidence.
Exercize at least every other day. It's one of the best treatments for worry. Pray or meditate. These time-honored practices calm the mind and help put everyday problems into perspective. Listen to music.