Headlight/Taillight ground issue

Hey guys. So an issue has popped up on my wheeler – the front right head light and tail light won’t work. The tail light shines dimly, but when applying the brake it goes out completely. People have told me this is probably a ground issue – are grounds easy to fix on a 2014 Sportsman 400 HO? I’d rather not take it to a shop and lose $150-300 on an issue that can be fixed at home. If it’s going to be too difficult, I guess I could suck it up and take it in. Any help is appreciated. Thank you!