cub stall crash

Hi sorry if my english is bad. Yesterday I flew my plane for the first time (ft simple cub) and I had some problems, the first is that when taking off from the ground you can see that it is going directly to the left (I took off from further back but I lost that recording), in the following...

Hi, My son and I just finished his simple cub scratch build and took it for a Maiden today. It behaved very strangely, tipping up, acting tailheavy and then stalling into a steep angle crash. Video here: https://youtube.com/shorts/BK9QqFOh9lk?feature=share The CG was where the plans specify...