I don't think people should 'practice' prophesying in the name of the LORD until they get it right, and then use it in public. (Should murders be practiced in private?) But I do think people who are going to prophesy in the name of the LORD should make sure they hear God right before they start prophesying in His name. Is that 'practice'? I wouldn't call it that.When it comes to words of knowledge, if you are just starting out, you could ask a few questions. Sometimes asking questions is a good way of dealing with a word of knowledge. You don't have to directly tell everyone all the words of knowledge you get to use them to edify others.Some people might start out using their gifts in one-on-one settings, then in small groups, and then in larger settings as they grow in faith. God may entrust a little at first and more later on as someone is faithful also