The written can be studied for and passed in weeks to months but most people take a few months and work on the written during flight training. Some people wait until the flight training is finished and have to take more lessons because they don’t take the written in a timely manner. There are countless online written prep programs that can be accessed online. Gleim is one that I used over the years from Instrument to CFI, ATP, and Aircraft Dispatcher written exams. If you are outside the US, ignore what I just said. You will need to find one that is specific to your locale because airspace and regulations vary around the world.
You can get a PPL in 6 months to 12 months. When I was a CFI, some students finished in 6 months and some were 12-24 months. It depends on the person’s schedule, self-study discipline, and how often they are able to take lessons. Those numbers can vary a lot. Flight time can range from 35-40 hours minimum depending on the type of flight school, but the average is around 65 hours before being signed off to take a practical exam.
You should inquire at your local airport. If they don’t have flight training, they will know who does and be able to give contact information.