About going outside and thinking your ugly, sod that, just go outside. If you don't face that fear you might become socially awkward later at some point, if you wish just ask your mum and dad if they feel like walking at first, till you feel more comfortable going outside. I wish I had done it that way back then...Then when you're ready, have some sort of condition and self esteem developed, go running, by yourself - or someone who wants to join.
People are different, that's what making it fun to be around eachother. If everyone would be the same this place would be boring !