The first thing to try would to make a strop. There are a few ways but basically all you'll need is a patch of leather, a flat board to mount it on and some polishing compound. They make stropping compound and its cheap but if you're close to a hardware store they sell polishing compound that will work. Look for the green chromium oxide stuff one instruction set - there are others
here is one of the better bits on how to use a strop
Part of the trick is consistence angle and pressure, don't do the showy wrist flicking you see from cartoon barbers.

So I bring this bit up about stropping because that is what helped me to finally get a good edge on a blade. Also once you get the blade good and sharp keep the strop handy when carving. it helps to hone the blade often on the strop to keep it sharp, it also helps to length the time between proper sharpening's.

once you get that down, it will be time to get a real stone set and sharpen properly. There are some good videos and descriptions online on how to sharpen but once again it is all about keeping a consistent angle and pressure. You know you're working the edge when you raise a small burr the side away from the stone. Once you have a consistent burr along the entire blade you can flip it over and work on the other side. Its not hard but does take practice. And with carving you'll get the practice. Once you get this down dull knives will really annoy you and you'll find yourself over Christmas sharpening your parents cooking knives because the apparently like to use pry bars to cut with in the kitchen or maybe that's just me (I find sharpening to be relaxing).

But as for the best stones there are a lot of different options depending on the money you want to spend.
Personally I like a tri-stone set like this there are others and they maybe cheaper elsewhere. Its not fancy but it works well. Used something similar before getting my diamond stones.

Another more budget friendly option, while you are the hardware store is to pick up some wet-dry sand paper. The 600, 800, 1000, 1500 grit stuff (some combination there of). Put that on a flat surface (board, glass, counter top) and use that to sharpen the knives, do this wet so pick up a spray bottle or a bottle of windex to rinse the swarf away. This is also called the "Scary Sharp system" if you want to look more into it. It is a good trick but the paper never lasted as long as I wanted.

I hope that helps a little in getting the super sharp knives that you are after. And end grain cutting is more difficult then side grain cutting so there is that as well.

One last thing I have that same MoraKniv as you do and love it. Great little knife. With a little practice that blade will be scary sharp again.