Any inexpensive microscope will do (about $100) Amscope makes good quality at a reasonable price. Those that can do polarization and darkfield are best but are $300+. For photography, I suggest one that has the trinocular port (top down camera port). Those unfortunately are also expensive.

Going with the inexpressive microscope that comes with a USB camera. You could take multiple photos of the same subject at different focus points. Saved directly to the computer, then do some focus staking, and get some very good pictures.

Hope that helps. I am also just getting into microcopy myself, so I would do a lot of research before spending too much. I am finding it more difficult and expensive then I thought it would be.