Great points about doing the exterior first.
After that, look to the interior. Before you do "painting", close the joint between the wall and the floor.
You do this by opening it up far enough to form HYDRAULIC CEMENT (not ordinary portland cement) into the crack. the cemnet will expand slightly and cure quickly. This is a prime leakage point since the floor slab always shrinks and pulls away from the wall slightly as it cures.
After that apply an appropriate waterproofing material (not epoxy). Drylok works OK and Thoroseal has ben used longer in more critical applications. It is also messier to apply.