Yes. Get all the theory out of the way as soon as you can - it usually holds up most students at some point.
Parts of the theory will make more sense once you start flying but I wouldnt worry too much about that particularly as you intend to start flying so soon.
It is worth mentioning that you might just as well get the medical done as well just in case it reveals any issues. You cant solo without it.
The usual PPL theory books are fine and will enable you to pass the exams. If you are considering a commercial career and have the time and inclination you may want to read more widely around the subject but this will only come in use later in your career. Personally I wouldnt bother yet.
Good luck.