This is a difficult situation you’ve been put in but the start to socializing is just first being/appearing happy and going out, what I mean by this is when your just walking outside which you need to do and see someone just say good morning etc but not all down and depressively say it how you would want it to be said to you, this will take trial and error but the key factor is patience you’ve acknowledged your lack of socialization now you need to go out and change, there will be some people who come to you in this forum talking about if your subhuman and ugly then you have no chance and to an extent this is true, you just have to find a group of people that don’t care which sounds crazy but they are out there obviously the majority of humans only talk to/ even treat other people who look good, good but I’ve seen ugly mfs get and be with pretty and beautiful mfs when on here you would never hear this happening. Overall just evolve and be you, try and fail and succeed and become the best version of yourself
