Done it myself bud...except I was in plaster for 9 weeks
Its the hardest healing bone in the whole body and you got to just rest it.
If you dont rest and it dont heal then next they will drill out bone from your hip and transplant it into your scaphoid leaving you unable to walk or race!
Guess your right handed then? Gonna be hard hard month or so unless you have a missus!
As you already prob know its know as a boxers fracture...welcome to the club! When the cast came off mine i needed about a month to get the stregnth back....you should be able (i believe) to touch your thumb with all your fingers in turn if its fitted right.