You should not let that stop you.
If you do your best to be as feminine as you can, that’s all that can be expected of you. Not all females are beautiful. You should not put such high expectations on yourself.
Take a look at my pictures, I’m no perfect specimen of a woman but I also don’t see myself as a man in a dress. I’m happy being as feminine as I can and that’s the best I can expect as a crossdresser.
I’ve never lied to anyone and said I was female. I’m not ashamed of being a crossdresser and I share my pictures proudly.