Still a Virgin at 21 and a failure

I’m 21 and a virgin. I’ve never been kissed, nor had a girlfriend, The reasons are complex, i eat to much and i'm fat my t-shirts are XXXXXL, but I’m finally ready to get out there and find my queen, even if I encounter a few xboxers on the way.

But where do I start? I’m terrified how women will react if I don’t even know how to kiss properly, as my sister would never show me.