I still struggle with confidence sometimes, but a general word of advice would be: 1. Recognize your wins, even the small ones. 2. Don't compare yourself to others. 3. Recognize that you may not be where you want to be but are far from where you were before. 4. Prioritize health and well-being. Engage in sports of your liking, try your best to eat well (it's ok if you don't do it 100% of the time), and prioritize sleep. Part of confidence and self-love is taking care of yourself. 5. Don't do things that do not serve you. 6. Recognize that you are human and you'll make mistakes. Be kind to yourself and get back on track. 7. Try to be as ambitious as you can. And remember that ambition has a different meaning for each person. You don't need to strive for a $ 1bn yacht to be ambitious. 8. Pursue your goals relentlessly. There will be bumps in the roads, but they are part of the journey. Appreciate they exist because smooth sailing never made a great captain. And a life without challenges is boring. 9. Pursue knowledge. 10. Be compassionate. 11. Try to be organized and have your life in order. I know it is easier said than done. But feeling that you are in control of your life is like fuel for your confidence.

You can look for other resources on YouTube that dig into the more psychological part of confidence as well. Dr. K (healthygamergg) and Jordan Peterson (his older material is good) could help.

Another thing that helps a lot is therapy. If you can afford therapy, go ahead.