First as said before wrap the blade to protect it while working with it or you will scratch it.
Sins it's a kit I expect the brass bolster to be precut to fit. If its a millimetre or so off just force it down in place with a wooden hammer.
To fit the other pieces simply measure the tang width and draw out how much you need to drill out and get the power drill out, the hole don't need to be perfect but the close the better.
Would also recommending getting an extra drill bits while you buy them because those 3mm brake quite easily. ;P
Ones you drilled out get the rasp/file or small chisel to remove the material to get a square hole, the fitting should be good but don't panic if it isn't. Epoxy is your friend.
Now simply epoxy the handle together, I would recommending building a "knife clamp" don't take more the 10-20 min but will be very useful if you decide to make more knifes.
Make sure that none of the pieces twitch while you clamp it down!
FUN PART! Grinding it to shape, get the rasp and start shaping your handle. When shape sanding, sanding, sanding and a bit more or sanding. Remember to clean the handle with a damp towel before you go up to each new sandpaper grid.
Now finishing. I like the smell of linseed oil so that's what I use. Two ways either you can dip it BUT! if there's any antler or bone you might not want to dip sins antler turns yellow by the oil which isn't nice looking.
So you can either dip it all the way to where the antler is or simply take a rag and use it to oil only the wood part of the handle and then simply keep applying more oil until the wood doesn't want to take in more.
For the leather sheath first wrap the blade and the handle in plastic to protect from the wet leather, then wet the leather form it around the knife and sew it together. (Search for more detailed on how to ; )
Wow this turned out be a long post. But I hope this helps you and I'm sorry if something is hard to understand because of my writing but was long sins I wrote so much in English. ;P
