msd, I had severed tendons at the base of my left hand fingers that required surgery. I cannot compare your injury to mine, except to say in my case, recovery was not 100%.
Ask your doctor what therapy is recommended once the splinting period is over. You will want an occupational therapist and not a physical therapist (there is a difference). Then dedicate yourself to the program they prescribe.
My occupational therapist said she found musicians to be her best patients, because they are dedicated to working hard to get the most functionality back from their hands they can.
For the time being, you are out of commission as far as guitar goes. Accept that. Trying to play with a splint on one finger can cause muscle strain and further damage on the others. Don't do it.
Eight weeks may seem like an eternity, but with just a splint on your finger, at least you don't have to have your significant other bundle your arm/cast up in a garbage bag and seal it with rubber bands every time you need to take a shower.
Spend your time listening to CG, following along with sheet music (this can help your sight reading). Also, you still have your left hand and can "practice" by fingering LH on your guitar to at least maintain your callouses.
Good luck to ya!