Personally, I liked to attach the front clamps as the hood front edge lowers itself onto the windscreen frame, when there is no tension on the hood. The handles should be really easy to close when the back edge of the hood is still folded up.
Once you have the knack, you can get them both latched with one hand while holding down the switch with the other. The rear cover motors then pull the back edge down onto the cover, and this tensions the hood.
The hood front edge should lower itself onto the windscreen frame. If the hooks do not fall in the right place, the guide pins can be adjusted. If the whole hood seems too far forward, then you will have to make other adjustments to the folding mechanism and its stops. This is not advisable (the original service manual says not to make adjustments to the folding parts of the framework).
With regard to the closing of the back edge... The pins (under the rear window) can be adjusted. Undo the tiny Velcro covers. You'll need a ring spanner to loosen the locknut, then the pins can be moved (to align with their holes) and adjusted for length. However, before you do this, you should check that the cover is aligned properly with the back edge of the doors - sometimes, the hinge nuts slacken and the cover moves, which will leave the holes in the wrong place to receive the hood pins. So, adjust the position of the cover first, then align the pins, and make sure they protrude far enough to lock down easily.
There are four microswitches (yes, four!) in the cover motorised holes. It is worth testing these with a multimeter to ensure that all four are working. Otherwise, the hood computer may not know when the hood is fully closed, and you might well find that it will not open again from the automatic switch (by the handbrake lever).
Couple more things... When opening the hood, as the back edge has half folded-up, I always think it best to get out of the car and make sure the rear window has folded evenly in a smooth curve. Otherwise, there is often a kink in the window that may become a nasty opaque spot, or even split in colder weather!
Also, as the front edge kicks back, I always think it best to give it a little push to help it fold - otherwise, when it folds back, there seems to be a moment of great tension as the mechanism goes back 'over centre', so to speak.
Hope this isn't too confusing