Need advice

Need advice I am really bad at putting my thoughts into writing but bear with me. I've read so many of your stories and they're so admirable. For the past few years I've started to speak less and less and let other people communicate for me. Today, at 24, i find that I barely order my own food, make phone calls, and try to avoid communication at any cost. I want to be confident and build up my self esteem to where I don't care what others think or what my anxiety says. My question is how do i gain the courage to put myself out there, just do it and stop being afraid and anxious all the time.