Help me better lucid dream

Date: 11/24/2019

Ok so I had a dream I was in a dark room and I had to play a game to get out (about like saw) and I was lucid and I read somewhere when you are lucid you could go into someone else's dream and I tried but I couldn't... So I tried to leave the room but I couldn't... It was like I couldn't do anything besides know I was dreaming and make cake appear.... Please someone help me