I've done my own maintenance since my local dealer went belly-up as next closest is an 18 hour round trip:-S
I've found it pretty straight forward and not hit any nasty's, certainly no harder than other motorbikes I've owned and simpler than a car.
I use an ATV jack to lift the Spyder to make things easier, though the first service I did was done on the ground.
Only complaint is there are some odd sized bolts etc and a mix of imperial and metric. For example the rear wheel nut is 36mm while the front is some weird imperial measurement.
You can get electronic copies of the workshop manuals cheaply, they are normally advertised on eBay. Mine came from Green Manuals.
There's quite a few videos in the DIY section of this site - I followed one of Lamont's ones the other day when removing my rear wheel ready for a new tire. the ones by this guy are also good:
https://www.youtube.com/channel/UCVyMKFuTap6q05rqvSb9skA
Sometimes I add a few more steps than he takes e.g. I use his approach for adjusting my belt but always remove/replace the split pin and torque the wheel nut.
If you wanted to start doing this yourself you could just start with the minor services which are just changing the oil and filter, adjusting the rear brake and inspecting things like fluids, brakes etc. The service pattern is minor/major with a service every 7500km (4660miles). Personally I prefer to do minor/minor/major with a service every 5000km (3100miles) - just like looking after my motorbike engines with good oil.
On the subject of oil - I notice you mention you're used to servicing cars - be very careful if you don't buy the official can-am oil that you get one that's designed for motorbike clutches. If you use normal car oil, even stuff that's otherwise the right grade, you'll muck up your clutch.
There is the BUDs system that you will not be able to tap into. The dealers do connect to this to download updates for your Spyder and check how things are running. For this reason it may be worth getting the occasional service done by the dealer. In my case this isn't an option anyway and as my Spyder is running sweet I don't see it as an issue. I did consider buying a 3rd party BUD's system myself but haven't bothered.