Mike:
One on the biggest "mistakes" the average do-it-your-selfer new car owner makes is trying to wash their vehicle using the wrong techniques, products, and equipment. You will need to invest some decent (2) five-gallon buckets with Grit-Guards®, (2) good wash mediums like a grout sponge or sheep-wool mitt (one for the paint and one for the wheels and tires), a good car soap like Optimum Car Wash or Duragloss 901, and decent waffle-weave microfiber towels for drying. EVERY Professional Detailer within this forum will tell you most of the "problems" they correct on daily-driven cars are from owners who do not know how to properly wash a vehicle. Using Tide soap and your old bathroom towels to wash and dry your car, while they may get the car clean, will leave less-than desireable results.
If you are determined to take car of your new vehicle on your own, take the time to search this forum for "how-to's" on this subject and then invest in the products and washing equipment as recommended by those in the know. Don't be surprised if your investment comes up to $200- $300, just for washing your car! A job worth doing is worth doing right and if you've spent $20,000 (Or more!) on that new vehicle, the money you've spent on car washing supplies is small by comparison.
That leads to another of my "hints". I get dinged on this all the time by suggesting that you leave paint correction and waxing to the detailing professionals. I am not saying YOU can't do it! Again, it comes down to investing in the equipment and chemicals that will be needed to keep your vehicle looking brand-new (or better than new). It's a major capital (AKA, serious coin) outlay. Do you have the resources to do so? Or would I be better to pay someone to do it for me? That's a question you're going to have to answer. I just want to point out that there are ALOT of good-intentioned do-it-your-selfer's who see the car-show perfect pictures of vehicles in car forums and then attempt to make theirs look just like that, again, with less-than desireable results, or worse yet, induce damage that will take some serious coin to correct. I am not trying to scare people into thinking they cannot get results like they see in this forum, but many do not realize that GREAT car-detailing is a skill that requires experience and proper application of techniques to be done correctly. There's far more than slapping on a thick coat of Turtle-Wax on new car and wiping if off with that old soft T-shirt from the rag bag.