You should spar with somebody a bit more experienced than you to start with. A good fighter will be able to spar without doing too much damage to you and you are more likely to learn off him. I wouldnt tell a boxer when he was going to spar during the trining session because sometimes they would take training easy to have more left for sparring if it was at the end of the session. Think you are ready to try a couple of rounds at this stage.