Brand spankin new to linux. Need lots of help. I've contacted YDL but they can't tell me if YDL will work for sure on a 7220/200. Can anyone here?

Here's what I wanna do. I'm out in the outback of Australia on a slow dial-up connection, I wanna go faster, but can't spare the 4k for the big guys satellite, and don't want give up my macs. I can do it alot cheaper, discovered a satellite provider with linux drivers for the satellite card.

My two machines are connected via ethernet, the 7220 has a ethernet card in its commII slot, my 8100/80 (maxpowrG3 upgrade) has a nubus ethernet card but I connected the 7220 to the built in older connection, using the transceiver thingy ( yeah, i think thats what it is), leaving the newer ethernet slot open for dsl...but we moved to far away to ever get to use it again. I need the 7220 to act as a gateway for the 8100. I also need to be able to use the usb/firewire pci card that has been intalled in the 7220 for my digital camera, which is a jenoptic so I have no idea if linux drivers exist for it.

Next part is...if the correct drivers don't exist, but I can run YDL I need to know if I can operate the macOS (9.1 btw) to do these things for me. Can I fire up the macOS and not linux and then go back to YDL when I am done? I only need the 7220 to empty the camera. If I can, how much room do I need to install YDL. The 7220 only has a 1gig drive in it, it is full of ram if that matters at all.

Any help greatly appreciated