A little background explanation: Everybody needs some external validation/attention including me,

I haven't received much, creating a negative loop of attention seeking behavior and unfavorable social consequences because of it.

Read a post about respect and it clicked for me that I need to get respect instead of seeking short term attention from these behaviors.

My question is: I'm good at many things and most people just don't know them about me how do I let them know without showing off? How do I not make it a one time thing and then they forget the next day? Ex: I'm a good artist and boxer