How can we keep our minds clear of distracting thoughts?

This cannot be done in a short time. I suggest you read the Buddhist scriptures~

Practice slowly, it will be so easy that everyone will be a genius. It's really hard, especially with something you don't like. This is the so-called difference between geniuses and mortals

Listen to some light music and try to calm down your mood!

Yoga

Or simply go for a cleansing session It’s a good place to stay for a while, and the monk temple is good... Shaolin ~ You can also learn Shaolin Kung Fu ~ (if available)

Also, don’t restrain yourself too much in everything, restrain yourself, and let yourself relax, then You won’t be so tight anymore...