Put rosin on it. Make sure to scratch newly bought rosin with sandpaper, a key, or a coin so it’s no longer smooth. You will need to rosin your bow about every time you practice. After practicing, make sure to wipe your violin with a clean cloth to get rid of any sticking rosin. Also, make sure not to loosen your bow as much as shown above!
It might also be beneficial to place your fingers near the balance point of the bow. To do this, lay out your middle finger (since it has the most balance) and place the bow on it. Move the bow to the right or left until it stays on your finger without falling off. Then put all of your fingers in place - your finger positioning stays the same, you are just placing your hand in a different place.
Remember not to put pressure on your hand; use the weight of your arm to pull the bow.
