I had "braces" in my 50s but these were clear Invisaligns. I had been self-conscious of my crooked bite for 40 years but, in a forward-facing job, I didn't want treatment that was obtrusive.
Over the years, I had consulted many dentists including a dental hospital who all told me mine was a very complex case, all suggesting different drastic and obtrusive solutions. I had all but given up.
Then, in my 50s, I came across Invisalign and a dentist who was confident they would work. Treatment took 18 months. It wasn't cheap, I think around £4000 which included some cosmetic work at the end to repair front teeth which had worn unevenly because of the crossbite. Now, I have perfectly straight teeth and smile without feeling self-conscious.
There was no pain involved in treatment and barely anyone knew or noticed that I was having it.
Obviously, everyone’s case is different but I also have a few back teeth missing, consequence of a 1960s dentist saying my crossbite was due to overcrowding and removing healthy teeth. I also have a slightly misaligned jaw due ( believe) to a childhood accident and which can sometimes cause nerve pain. One of the more drastic suggestions from the dental hospital was to break my jaw, reset it and then wire my teeth.
I’d advise getting second and third opinions about your options. Not all dentists are Invisalign practitioners. It may be a treatment that wouldn’t work in your case but it’s worth exploring if the cosmetic aspect and discomfort of wearing metal braces bothers you.