So first post and brand new to fly fishing so be gentle with my ignorance and potential mis-use of the forum please.
Having had a lesson

I'm now up for fly fishing proper, specced my kit and on the buying cycle.
One thing which trouble me

is flies, I don't know one end from the other apart from one end hurts, once my Match the Hatch book comes it will be glued to my hand for weeks to get this dry, wet, emerger thingy sorted.
I have bought a 50 fly grab bag for stillwater, but right now they just look like the contents of my hoover bag. As for dry, wet etc, I guess I'll just have to drop them in a bowl and sort the floaters from the sinkers.
That is unless there is some kind of standard to distinquish the types, is there, gold hooks= dry fly, black hooks= wet fly etc, I'm guessing not.
So I was thinking there must be a foundation set of flies, the staple diet of the Trout. I get the fact that it depends on tempature, local food sources, star sign, luck, and advice from the balif.
To avoid my confusion I'm now thinking keep it simple, my question to all you clever folks is what would be your top 12 flies for south of England stillwaters (fair weather, don't do cold & wet).
I plan to compare the responses and buy the top 12 for now please, would you normally buy the same pattern in different sizes? talking of size I'm told a #12 is a good starting point?
Thanks...... off to look at reels now, Lamson Guru, Sage 4250, Hardy's ujamaflip, so many toys, so little money................