Hi Yenneffer
Well, there you go! You're now on part of an interesting journey. Firstly, have faith in yourself, and always, always be kind to yourself.
We transgender folk walk an interesting road, with ups and downs. Guys will look - it's cool. Girls will look - it's also cool. Forget about their motives, and smile. Some days nobody will look - it's also cool.
Try not to beat yourself up about stuff - we all have bad days, and we've all had times when we know that a store assistant has figured us out (whatever that might mean), but is kind enough to just do his/her job. It's also cool, and little by little you will find yourself reveling in your transition and finding yourself comfortable with who you are becoming. Just don't be a perfectionist, give yourself time, and don't turn little bumps in the road into mountains.
Hugs
Julia