Hello sworkscooper, I hope you are at least o the way to recovery from the various winter bugs which are going around.
I am surprised that more people have not replied with suggested routes to Italy.
My suggestion would be to (at least partially) follow the route my wife and I took way back in 2008 when I retired early. We had earmarked Lake Garda as one of our destinations, but also went all the way down the West Coast, across to Sicily, across the bottom of the mainland to the Trulli houses in the "heel" of Italy, then up the E. Coast ending in Venice. That was an 11 week tour, so perhaps not quite what you have in-mind. Our initial route was:
Down to Chamonix, through the Mont Blanc Tunnel (E25?) Aosta (well worth a stop-off), down towards San Remo (again, the old part is V pretty), then the beautiful village of Dolce Aqua.
My memory of the route after that gets a bit hazy, but doubtless Satnav will sort-out the rest. I WOULD suggest that it is ALWAYS worth enquiring at local tourist offices for advice on the best local attractions, and upcoming festivals etc. Local knowledge is priceless, and it often rewarded us with unforgettable memories.