I need some advice about a few things , like how I can acquire those things and etc. 1. How do I gather the courage and strength to stand up for what is right?

  1. How to stop hiding things and lying and not speaking the truth.

I don't know how I can gather the strength to speak the truth and stand up for it.

(This is not related to any relationship with a woman or something of that sort but I just want to know, as a 18 y.o, how I can improve myself)

Thank you for reading this.