Yes l, the meaning is exactly that: do not promise anything until you are sure you can get it. An equivalent (and slightly more cruel) would be "non vendere la pelle dell'orso prima di averlo ucciso" (lit. "don't sell the bear's fur before having killed it").
I'm very interested in this proverb! How do you use it? Is it sorta the same as "don't count your chickens before they're hatched"?
Yes l, the meaning is exactly that: do not promise anything until you are sure you can get it. An equivalent (and slightly more cruel) would be "non vendere la pelle dell'orso prima di averlo ucciso" (lit. "don't sell the bear's fur before having killed it").