There is no need for a learning fight. You learn this fight by doing it. Yes, you are going to wipe, just accept it. Every hard mode fight I have entered, I assumed I was going to die the first few times. If I didn't, it was a pleasant surprise. When I did, I learned and watched those that were better than me. There are parts of the game that are going to be hard. That is the point of a game, to be fun and challenging. SE doesn't need to hold your hand through the whole game. They have given you everything you need to do the fights with a few exceptions, and Titan is not one of the exceptions. It is up to you to use what they have given you.