Braces

Well, the title says it all. I will be getting braces tomorrow at 29 years old. I am beyond terrified. Is it painful? Will people judge me for being older with braces? This will sound dumb, but I am terrified my lips won't cover the braces when I have my mouth closed. Am I irrationally nervous? My mind is all over the place and I'm so nervous and anxious I am considering not going. Please give me tips or advice to calm my fears. Thank you

Edit: I am staying anonymous because I am embarrassed. I shouldn't be, but I am. Anyways, I could have invisilgn, but he said I would have better results with metal braces. My mouth is too small for all my teeth, so once the top and bottom teeth are aligned (I have a cross bite) I need four teeth removed and then the braces will be put back on to fix my over bite and push all my teeth into the proper place. It's going to take a long time. And that might be the most upsetting thing for me to accept. I'm really have a hard time but I've always wanted straight pretty teeth and I can actually afford to do it now. Thank you all for your kind words and advice