As you may be aware, the minimum age to fly solo is 16, so even though flight training may be logged from the age of 14 (unfortunately this means the hour you have at the moment won't count towards the license). Alot of the hours towards a PPL require you be able to fly solo, meaning if you do start training at 14 you will find yourself limited as to how much you can do. The license itself cannot be granted until you are 17.
I would suggest you wait until you are 15.5+ to start any proper training. Until then try and find a local airfield/flying/gliding club and see if they are happy for you to help out at as a volunteer. This way you will be around light aircraft pilots, instructors and students, which is a great way to soak up information about aviation, and it most certainly helped me. You may even be fortunate enough to go flying as a passenger with a club member if they have a spare seat.