If you want something not very good maybe? or a used deck I don’t think you’re going to find anything of much value for under 50 dollars
You really can’t just learn to longboard in a day or two maybe to physically ride a longboard yes, but longboarding is a constantly expanding thing you can always get better and I would argue that it’s not easy. Chec out the bustin maestro good commuter board.
Likely you’d want to sand it just enough to take the paint off the. Repaint I don’t think you should bother with scratches it’s inevitable
What’s your price range?
http://bustinboards.com check out the push series maestro’s and sportsters make good all around and commuter boards.
You’re going to fall a lot get used to it wear proper protection helmets gloves pads whatever the better you get the less you fall but the worse the falls will become. Start slow master the basics work your way up be safe have fun. When in doubt use a spotter when still in doubt don’t do it but push limits just not too hard. Learn to slide the most important thing in downhill skateboarding is learning to use the board as an extension of your body and gain complete control of your movements and ability to stop whenever necessary. Downhill skateboarding is addicting be warned.
Bustin maestro is probably one of your best bets as a commuter board if you ride regular if you push mongo go with a bustin strike