It doesn't sound natural but it makes sense. To sound natural fix the grammar: "I haven't driven in a long time and forgot how to drive. Having a new girlfriend made me immediately work on my driving skills due to the rumor that women are turned off by men who don't drive, unless there's a medical issue."

Hi Akira, Some grammatical changes! I haven’t driven in a long time and am starting to forget how to drive. Having a new girlfriend made me want to pick up my driving skills as soon as possible again as rumours has it that women might get turned off by men who can't drive unless there’s a medical issue. Hope this helps!

"causing me to forget how to drive" would sound more natural than "forgetting how to drive". Everything else seems okay.

Sounds good to me.

''...due to a rumor that women are turned off by men who don’t drive unless there’s a medical issue'' - Damnn no wonder my gf left me, I can't get over my PTSD