Luckily these are solvable problems.

You can trim/shave your hair.

With regards to clothing you can use instagram to follow men or pages whose style you like and use that as inspiration.

Finally, I'd recommend getting in above average shape. Make going to the gym a part of your life. An hour everyday before work of straight after.

While you're doing some/all of these, I'd start to just talk to everyone. Men, women, old and young. That way you get into the habit of becoming more sociable and confident.

I know these tips may sound superficial, but they help shifting an external locus of control into an internal one.