Yes, you don't need to be here for 18 months to apply for provisional license. I applied for my provisionary license 2 months after I got here. I got the application form from local post office. I submitted it together my original passport, original marriage certificate , 50 pounds check and 1 passport style photograph. You can also apply online https://www.gov.uk/apply-first-provi...riving-licence

I got my provisional license 3 weeks after and then got my passport and marriage certificates 2 weeks after I receive my license.

And now having my driving lesson. Good luck!!!!