The reavers look nice.
The hero is a great start into the world of modelling.
I use both greenstuff and milliputt.
I also use sculpting tools and color shapers I bought off of ebay.
Remember to keep your tools wet (

) as this will stop the putty from sticking to them.
For drilling I know you can use a hand held hobby tool (dremel) but I use a 12v battery drill with between 1mm and 2mm bits for drilling and pinning.
You have to be very careful you don't drill your fingers and ALWAYS wear goggles.
The drill bits are small and snap easily, one of those in your eye will have you looking like a pirate for the rest of your life, NOT FUNNY!!!
I managed to drill my chaos general on dragon mounts hands to add an axe from the botfa dwarves.
As long as you take it slow and steady you should be ok.
I also managed to drill and pin my trebuchet's struts that are 7mm square using this method.
But when all is said and done there are a LOT of better modellers on this forum than me
