OBJECTIVE:
You can easily connect an CF Card via an USB Multicard Reader to your PC running WinUAE and mount the CF Card under WB.
I would definitely suggest an preinstalled ClassicWB installation (Full version is an awesome way to go for your machine) which you can get here (instructions of how to do it exist as well):
http://classicwb.abime.net/classicweb/full.htmSince classic WB is based on WB3.0 (or if you have 3.1 disks you can upgrade to 3.1 from the installation as well) you only need the 3.0 adf disks (which if you don't already have or can't find) or an Amiga Forever installation (
http://www.amigaforever.com).
Check if you like that aspect and we can talk later then if you'll encounter any problems or need further consult.
EXTRA:
To be able to use an USB mouse there are only 3x solutions out there.
1. Buy a Subway USB adapter (
http://amigakit.leamancomputing.com/catalog/product_info.php?cPath=26&products_id=137) which you can use via the Anaiis USB stack for Mouse and some other things or with Poseidon USB stack and almost every USB device there is (but requiring an 030 accelerator).
2. Buy an adapter (there are some on eBay iirc) that has USB connection along with PS/2 and 9pin normal.
3. Buy a Micromys or Cocolino from an AmigaStore that is a 9port to PS2 adapter which you can use to connect an USB mouse via an PS2 to USB adapter (most USB mouses of old times had this adapter -green- as standard). FYI not ALL USB mouses are compatibles with USB to PS2 adapters so some caution is needed.
Good luck and I hope I covered most of your questions