Otherwise you are just going for yourself.
What's wrong with that? OP says she has always wanted to go. Just because she's a parent now doesn't mean she shouldn't go on holidays that she'd like as well.
OP, go for it. You and your boy will have an absolute blast - there's loads for toddlers. Safari in Animal Kingdom, toy story land in Hollywood Studios, Frozen and Remi in Epcot, and pretty much everything in Magic Kingdom.
Definitely stay onsite at a Disney hotel. You'll feel safe, and there is free transport to get round the parks and other hotels. There's also the free dining plan offer on at the moment for 2026 bookings.
Staff members at Disney are amazing, so friendly - they'll make you and your toddler feel really special.
You can get an Uber or Lyft to the Premium Outlets for shopping - they're only a 10-min car journey from Disney - or Florida Mall.
Timing wise, I'd go for earlier in the year and avoid summer, as the heat can be brutal. Just avoid Presidents day and Spring break, as it gets really busy.