Definitely excited for you! I am sure that you will have an amazing time! Like others have said, going solo is truly an awesome experience and I hope this doesn't open Pandora's Box for you

Having total freedom to do as you please during your
ENTIRE trip is certainly a fun way to travel! But seeing as how you seem to be well-versed in Disney travel, I don't know if there are many "tips" to offer that you probably aren't already aware of. The only difference now is you can take advantage of solo rider lines or proudly cut in ride lines when the CM is looking for a 1 or 2 to squeeze into the ride vehicle

Or is there something specific you have questions about?
As others have pointed out, the biggest difference as a solo is that you only need please yourself. Having total independence to do what you want is definitely wonderful, so treat yourself! I don't mean this in a harsh way, but take advantage of not having your family around. It's a great chance to do the things you want to do that you wouldn't have done if you were there with your family. Maybe there are rides or shows or restaurants you have had your heart set on (or not set on)? Perhaps there is a resort or two you have always wanted to explore? Maybe you have always wanted to ride the TTA 26 times in row? Make a list of things YOU have wanted to get out of your past trips but never have had the opportunity to do; going solo means you get to be selfish

On the other hand, since you have a family, maybe there are things you can "scout out" for your family's next big trip? Maybe there are things they would like you to report on or take pictures of? Perhaps there are ways to "involve them" without them actually being there?
But definitely soak up the "me time" as it is such an awesome way to experience Disney. The one tip I can offer is to keep the freedom in check. What I mean by that is sometimes I get carried away with the ability to do whatever, where ever, whenever and go berserk cramming in a ton of rides and shows and whatnot, but then realized I forgot to eat both breakfast and lunch. Or I have planned for several things in between ADRs and rushed through stuff and missed out on actually enjoying those moments and storing away those memories. So in the midst of all of the crazy, fun times that you will have, don't forget to sloooooow doooooown and appreciate the finer, more subtle details that Disney offers.