Busy is a choice.
Stress is a choice.
Happiness is a choice.
In every situation you make a decision. You can choose how you want to face it. You can choose to dwell, at times this is ok if it helps you to process it. But call it a day after sufficient dwelling. Choose to be positive.
Also when faced with new things:
If it's important, you will find a way.
If it's not important, you will find excuses.
There is almost nothing that is impossible. If you are afraid to do this or that, then perhaps you do not want it enough. It's not important enough. You are not hungry enough. Which is also not wrong, then don't do it! But if by not doing it you continue to feel down, then give it your all. Always go back to part 1 of making your choice wisely.