Hi Philosophy PhD,
congratulations on securing funding!! Advices (you always have to consider the source though):
-Get some proper holidays, because you never know when will be the next time you will have carefree holidays again!
- Save some money (you will need them in the case it takes you a bit longer)
- Reading of basic material that you will need in any case, like "how to write a literature review" or study basics statistics ( depending on the field, maybe you don't need them in Philosophy), or some basic book on your field.