LOL…I was in the same position as you 2 years ago. I was so undecided the two bikes on my list were the Ninja 250 and the Kawasaki Vulcan 500 (cruiser), but I somehow ended up with a 3 wheel scooter. That shows you how undecided I was! These days I want a dual sport. I still want that Ninja 250 but that will have to wait.
Your needs (storage, touring, commuting) are pretty common and don’t rule out many bikes but obviously some are more suited to those tasks than others. I would say large scooters are very suited to those requirements as they have great built in storage and fantastic weather protection. The down side is they are expensive and have lots of breakable plastic in case of a drop. They are also typically heavy so make sure to check the weight of that Burgman before you decide to buy.
I will add that the handling of scooters is supposed to be poorer than an equivalent motorbike as a lot (most) of them have what is called ‘unsprung’ weight. This means the engine is not mounted in the frame like a bike but on the back wheel but I’m not sure how significant this is for a beginner. Can’t say I’ve felt any handling problems but it may be I will only notice this difference when I get a regular bike.