Take a look back on your life thus far.
Note down everything that is an achievement, everything in your life you can be proud of: any awards or certificates, any great photos you've taken, a painting you've done, a meal you cooked that everyone marvelled at, kids you've helped raised (or are raising) that are happy and healthy, a good looking pet, a plant you've raised from a seedling etc.....
Take photos of what you can (ie dont rip up that fantastic plant just so you can nail it to a wall inside) and put these things in places you'll see them every day. This will remind you that you are a good person who can be proud of many things. Mind you, the day I could get even a weed to grow, I think rip it out and frame it - a green thumb I have - not!).
Strangers only see the vehicle that your soul is riding around in and unfortunately judge you on that. That's their loss and not your concern. You'd be a nervous and physical wreck if you spent all your time trying to show everyone that there's more to you than the outside they see.
YOU know the real you and congrats to making a decision to put your physical body in for an overhaul so that it will allow the real you to enjoy all the things in life that you want for a long time to come.