Get a manual, follow the procedure slowly and methodically, watch a few youtube vids before you do it to give you an idea of what is involved, totally doable by a DIY mechanic. It would be a good idea if you´ve never done it before to get a mate to double check as you´re doing it, the second time you´ll wonder what the fuss was about. The Honda factory toolkit has the perfect spanner for the 24mm valve inspection caps, ordering a new set of o-rings for the inspection caps and timing holes might not be a bad idea before you start, they are reusable but if you find any damaged when the caps come off handy to have spares. The only thing to watch for is the decompression system (auto or manual), that opens the front right exhaust valve as you are sitting on the bike , it has to be fully disengaged when you check the clearance on that valve. It will all be in the manual.