It really depends where in Germany you were, and to a certain degree how lucky you were. Joseph Goebbels himself had a minor disability and was a leading Nazi so it's clear exceptions could be made.

Nazi policy varied massively across Germany and a similar thing is seen with the initial treatment of Jews as this changed drastically depending on where in Germany you were, as Hitler's instructions were often unclear, disorganised and open to interpretation.

Overall I'd say you'd probably be fine, but it really is an odds game. However you'd be more likely to wind up in trouble the longer the Nazi's were in power, especially with the war.

They didn't jail people for disabilities — the main means of persecuting them were through sterilization or euthanasia. It was treated as a medical issue, not a criminal one.

There is a category of the German sterilization law for "severe hereditary deformity." What's tricky here is that it isn't clear whether they would have thought cerebral palsy was hereditary (I just don't know, but it's not impossible), though it doesn't sound like what you're talking about is "severe." If your physician reported you to the sterilization court ("Genetic Health Court"), your chances of being sterilized would probably be high (because almost everyone's was, once they ended up there), but it doesn't strike me as super likely you'd be reported for that. But this could be a rather arbitrary thing so there are big unknowns here.

As for euthanized — the Nazi euthanasia program was applied primarily (almost exclusively?) to people living in state institutions. If you were capable of living independently you wouldn't have come under the auspices of the T-4 program.