Bless your heart, and your determination to support your dad. I'm nearly a decade older, and I can promise you there is NO gift greater than loving & supportive kids (I have 3) & similar young friends. I solved the problem of driving test anxiety by opting out of driving; it's actually been freeing (and no problem, thanx to Lyft, good public transport & preference for walking 2 or 3 miles.) You might want to share my recent piece, "Should You Still Be Driving," with which I convinced myself I shouldn't. Your dad might find himself agreeing. Thanks for this!