First attempt on spelt sourdough

My initial plan was to use the basic tartine method. Since I'm not (not at all actually) familiar with spelt flour I didn't stick to the schedule after all.
I fed my levain at 10 pm:
-50 g whole wheat
-50 g white all purpose flour
-100 g water
-1 tbsp active sourdough starter
Next morning (around 8 am):
-100 g active levain (passed float test)
-300 g water (room temperature)
-100 g all purpose flour
-400 g whole wheat spelt flour
Autolyse 40 minutes.