My goodness.
This is really useful advice. I’ve tried reading it again and again, and I think I’m starting to understand the differences in microphones and technology.
I use a Sony Hi-Md mini-disc player - I haven’t really moved on in technology since then. My computer is about 7 years old, and falling off its hinges.
I think I understand, that I was probably looking for a low impedance microphone, which could just run off my mini-disc 3.5mm jack, without needing extra power. This is why I was thinking a battery operated one would be ok.
The mix boxes must provide that power supply to the mic then right? Can I not just get a quality mic, driven on its own power supply, and hook it via a 3.5mm jack to my MD player? . My minidisc player holds 1GB memory per disc, so it will do for my fun purposes.
Thing is … is this a decadent technology, and should I just upgrade? I like the H4N Zoom thing - that looks easy enough to use. But if there’s any other boxes or bits, I’m afraid my brain just goes into melt down. It costs around £260 which is (gulp) more expensive than my minidisc player!
If I got a stand alone microphone, would it have enough energy to run, without a power supply? I don’t wish to have mains or USB driven microphone - one that can run itself, and just connect to a 3.5mm jack. But that H4N Zoom looks very attractive. It seems to have some great reviews. I wonder if I can start making my CDs with terrible music on it lol.
Are there any microphones which are good enough to span use for flutes, recorder pick up, as well as harp, without picking up breathing and breaths of air?
If I got a mixer, is it possible to use it without a computer? I don’t like my computers very much! The thought of having to figure out which wires/connections/XLR etc is beyond me.
7, For your minidisc recorder you could try one of Sony’s stereo electret condenser mics like the ECM-DS70P or similar. They are really cheap on eBay. Not a bad first place to start.
Haha! That’s what I’m using! 
It’s not very good. It makes my bass recorder sound like a treble recorder!
I like the idea of a video/sound recorder. Maybe I should join in and become a youtube maniac …
Thanks for the ideas everyone …I’m still having to read these suggestions and go over the recommendations.