It can be very frustrating when you think you have everything you need to succeed, but still not achieving any results. Lots of people quit when things get too complicated or takes too much time. I will give you 3 steps that might help you to still get what you want, without pressing the exit button(quitting)
Most quit as soon as they hit a wall. To get some achievements you will need to break through that wall as this will be the only way to get to the other side. If you are staying behind the wall, you will never see what is behind it.