You have to stay calm and figure out what you want.
Write the pros and cons .. ull get solution ... But first calm down ..
Start self talks . You can do it in front of mirror. develop writing skills and if you already have it then start writing poems & paragraphs.
And yes Don't forget to get well dressed. Because your look is just directly proportional to your mood and confidence
If poor academic performance leading to your low self Esteem then start Taking risks. Have a short goal and complete it within time. It'll definitely work because I've seen its results.
All the best🤗
Thank you all especially smoothykatty
Believe in yourself.And don't try to take big responsibilities right now.Try to achieve small goals first.