how do you get over being socially awkward because of nervousness etc

i'm a male in my 40s and i have not very much self confidence due to a lot of problems i faced in the past, plus i have anxiety disorders and get very nervous and act socially awkward, unsure of myself- around certain people, especially other men.

how can i stop doing this? and act self confident and normal? i know its because of my disorders i act this way, so it isn't really my fault.