Congratulations , welcme to the best feeling in the entire world.
my advice ( for what it is worth)
Spend time finding a good instructor, one that you get on with, one that you "click" with. THIS IS THE MOST IMPORTANT THING EVER.
better to spend some time now figuring out if you can work with this person that to have to figure out how to swap instructor when it isn't working out.
Remember you are literally trusting this person with your life ( as well as your cash and dreams!)
Read as much aviation stuff as you can, not just the text books for your course.
Remember that no one controls the weather and you will get stuck for lesson after lesson with cancellations due to sucky conditions!
There will be ups and downs ( pun intended) everyone has them , you WILL get through them.
I found keeping a diary/blog helped because I could read back to my earlier posts and keep myself motivated when it all seemed to be going wrong. I also invested in a gopro camera to film my flights ( rewind is so usefu!) but check with your instructor before filming anything!
Oh , yeah and remember to have fun as well !!!!
