I agree w/PPs to just go w/the flow & do whatever you want whenever you want to. That's one of the main joys to travel solo to WDW IMO.
I also recommend having a loose itinerary at least. Be willing & ready to change at the last minute if something comes up but try to have a general plan for the day, like which park you want to go to & if you will hop to another park for a night time show, etc. When you link your tickets to
MDE, make your FP+s if you will be using them for the attractions you want.
Here's an example of what I mean by loose itinerary: I scheduled my three attractions for FP+s in Epcot for an evening. I know Soarin is a priority for me so I arrange that one for a time I know I will be able to make for sure. The other two I choose are for attractions I like but do not necessarily need a FP for so if I am not in the area or I happen upon a street show in WS & want to stop to see it, I don't worry about rushing to make it; I just stop & relax for a while to enjoy the show. After that, I may decide to head to the attraction for SB or not.
There have been many times I had planned to hop from Epcot to HS to see Fantasmic but either made it to HS & did attractions there instead or just wasn't feeling it & stayed at Epcot or hopped to MK. Once I was determined to follow through w/the plan so I went to see it & ended up getting antsy half way through & left. This past trip, I set more time than usual aside to stay in HS. I saw it from start to finish & had such a great time!
I also found it easier for me to look into the options for food in each park by asking questions or reading threads on here or looking up the menus & reading reviews. That way at least I am aware of what's available wherever I happen to get hungry & it becomes less overwhelming than pulling out a map or stopping at each restaurant to look at the menu before deciding where to eat.
Some people prefer having no plan at all & just hopping on whatever 1st bus shows up & heading to that park for the day, which is great if that works for them. But planning out the day somewhat for me seems to work best, especially for my solo trips.
