What should I do here?

I need to get this space insulated to try and combat the summer sun pounding on this area of my house. It’s a split level with two attic sections that are extremely shallow. I have ridge vents but no soffit vents (yet), so today installed rafter vents on one side. Probably the toughest thing I’ve ever done considering I was on my stomach or back the whole time. You can see one of the vents in the second pic. It’s 4ft and only maybe 16” above the attic floor where it stops. So should I just blow insulation up to that point?