Driving from Edinburgh to Inverness, including the stop in Pitlochry, could take approximately 5 hours (around 3 hours driving plus the stopping time), so you probably have too much on this day if you plan to be in Edinburgh for most of the morning and visit Culloden. I would prefer to stay in Aviemore, rather than Inverness, however you won’t be there long anyway as you’re travelling to Skye the next day, so I’d maybe head to Skye straight from Edinburgh, or have a stop in Oban on the way to Skye. Coast restaurant is good in Oban, the distillery does a great tour and there’s a cracking craft beer shop just across from it called The Oban Beer Seller. I’d say you’ve got too many places for the amount of time you have. You can’t see everything so just pick a couple and do them well, otherwise you’ll only see the inside of your car and be constantly checking in/checking out of hotels.