Free: Contests & Raffles.
When I first started shooting a bow I took lessons at my local archery shop. I think I did 5 or 6 of them. It is a little bit of money up front but tought me a lot right at the beginning. I didn't start with any bad habits and that is a big plus. I'm sure you have read it several times but practice and more practice. Shoot 20 - 30 arrows a day and you will be surprised how accurate you can get. If you are shooting bad one day and are all over the place on the target just stop for the day and start fresh the next day. Also the aim small miss small slogan is really accurate. One day I switched it up and placed an apple propped up in front of my target. I was surprisingly accurate even at long distances hitting an apple.The last thing that helped me is to try and shoot with someone every once in a while who is a lot better than you are. You can pick their brain and they can teach you little tweaks that will help you improve your shooting.