Having had a quick look on
, there appears to be an abundance of parts (hopefully in the colour you need).
The bonnet will be tricky to align and is really a two person job.
I would ensure the bonnet closes and more importantly, opens, before fitting the new bumper & grille, so that you can still reopen it, if it jams shut.
The bonnet is changed by undoing the bolts securing the hinges to the bonnet.
The bumper & grille should be removed first, and the headlight changed, before fitting the new bonnet.
You will most likely have to remove both front wheels, so secure the front end on axle stands, so that you can remove wheelarch liners, and gain access to all the fixings. You'll know where they are located, by looking at the new part.
This is a BIG job, so allow a weekend, and put a cover over the windscreen and wings to prevent damage.