Reading and writing disks are not the same thing. Just because you can read a disk doesn't mean you won't have trouble writing to one. Either way first you should try to format a blank floppy in Human68k, if that doesn't work the game's internal program certainly won't.
Also most floppy drives are in varying states of working. I had 2 machines at one point, they both would read everything i had except Bosconian. Only one of the machines would read it. I swapped the drives, and then the other computer was fine. Only that one game gave me trouble on that set of drives out of over the the 30 or so retail games I had at that point.
First off, does your CD-ROM drive even work properly on your system? I don't follow facebook so much, but quite sure you posted a picture of your driver floppy giving you a CRC error (big white box in the middle of the screen).
If that is you, the problem you have is that your PRO does not support SCSI. Hence, your SCSI CD-ROM and driver will not work.
X68000, Ace, Pro, Expert models are actually SASI based machines. However the later machines, Super, XVI, Compact, X68030 use SCSI. This is why the Super goes for so much more then an Expert/Ace/Pro.
The AztecMonster, SCSI2SD, etc are SCSI boards. You can't just plug them into your SASI based Pro. They are not compatible. But, there are 2 ways around this.
SCSI I/O board. These are quite bulky, but the Pro does have 4 slots, so not a bad upgrade, and usually cheap enough.
SxSI. Software driver that installs into the machine's SRAM. It allows SASI machines to use SCSI devices. This is how 90% of people with SASI machines use the SD/CF boards. The only issue is that you need to install the driver off of a floppy disk. So you will need someone to supply you with said disk.
Once you have either working, your SD/CF board of choice is not so important. These days, most people go with the SCSI2SD as they are cheaper to buy and ship. Being in Japan, the Aztec costs more but saves me on shipping. The Aztec also mounts perfectly if you have the original mounting plate.
My vid is very old. These days I use dual drives. I have my AztecMonster internally as my main boot drive, and I also have a PowerMonster in an external case as a secondary drive.
Note, there actually is one board that does directly work with SASI. But it is the most expensive, only sold here in Japan. SASI support makes it plug'n'play, but SASI has very limited partition sizes. You can only do like 40mb or so partitions on SASI, as opposed to 1gb partitions on SCSI.
If you plan to use the NFG image, you will need to go SCSI. The SASI board is only really useful if you plan on doing your own image from scratch.
Mouse could be dead, but you could also have PSU issues starting to creep up. My keyboard starting acting really weird, sometimes working, sometimes dead, sometimes half-working. 2 weeks later my PSU blew-up. Swapped in a new one, and no issues since. You really need to test the mouse on another system to be sure. Or just buy one, standard mice are quite cheap.
EDIT: Forgot one other thing.
You said you have 12mbs installed. So I'm guessing that you have 2mb internal and an XSimmX or something similar in a rear slot. On X68K machines, RAM has to be configured using SWITCH.X on a Human68K boot disk. The settings are then stored in the SRAM. If you don't do this, or your battery dies, SRAM resets, etc. The computer will only use the default 1mb setting. It does not auto-detect RAM like most other computers do. You must setup your RAM manually.