If the hood isn't flush with the header panel and sits too low, then you need to adjust the two hood bumpers (items 6, 7 and 8 in the link I posted above). If the hood pops up too much and doesn't catch the latch when you pull the handle, you need to adjust the spring tension on item 10. When you pull the handle, the hood should pop open about an inch or so. Just enough to get your fingers under there. From there you won't be able to lift the hood unless you pull the handle again to release the latch. From what you're describing, it sounds to me that when you pull the handle your hood pops open way too far and missing the latch.
Ed