I randomly came across this article and thought the advice was very good:
https://riskology.co/alone/
If you're an introvert I'd highly recommend reading the article.
The 13 rules are:
1. Understand you're good enough all by yourself.
2. Value others' opinions, but value your own more.
3. Learn to be an observer.
4. Close your eyes in a dark room and appreciate the silence.
5. Learn how to talk to yourself.
6. Cherish every interaction.
7. Rearrange your furniture.
8. Avoid mindless consumption.
9. Create, create, create.
10. Make plans for the future, and pursue them immediately.
11. Go to a movie alone.
12. Pursue an impractical project.
13. Volunteer your time.