Tossing a cornhole bag will require both focus and accuracy. It will take some time and practice before you can successfully master one style and there are actually several techniques to learn. You will find the right throw that suits your body and personal preference. Aim to get the correct arch and body mechanics. Many experienced cornhole players will advise you to get the right arch and enough room for the cornhole bag to slide as soon as it hits the board. You should throw in many ways until you get the right feel and score better in an actual game.
If you throw a bean bag with a very high arch, the bag might drop lower on the board and simply stick. Your objective will be to throw straight for the hole cut onto the board to get more accurate throws.
Throwing a cornhole bag with a low arch will tend to result in the bag sliding. If you prefer this approach, you have to practice on your accuracy or you risk having the bag slide down during actual games. You might need to use both options or keep practicing your arch and style until you can get more direct hits. Keep in mind that the technique of players will vary but the board and bag remain the same in terms of consistency and measurement. Learn your technique and practice with friends until you are good enough to play in a team. Also watch how others do it and find the right arch that works for you.