As a DM who often works with open water classes and beginning students, I have one particular issue with split fins. New divers are a lot like people learning to ride a bike, except the diver is the bike and the tank is the person on top of it. Keeping the balance of that diver/tank system is something all of us who dive eventually learn to do without even thinking about it, but for a new diver, it's a challenge. Every time the tank gets a little off center (and it often does in the all too frequently ill-fitting BCs that shops use for classes) it wants to roll the diver. You need some kind of horizontal stabilizer to stop that from happening, and splits just don't "bite" the water well enough to do that job. In my experience, open water students using splits are the absolute worst for hand-waving, because they are desperately looking for SOME method of attaining stability, and they can't do it with their feet.
To the OP: Scuba gear is interesting. There is a lot of very good equipment that isn't particularly attractive, and there is a lot of attractive equipment that isn't very good. Buying on aesthetics is rarely advisable, unless you know a good deal about the other qualities of the item you are purchasing. For example, I recently bought a pair of bright yellow Jet fins. I bought them because they were yellow . . . but I own three other pairs of Jets, so the characteristics of the fins were no surprise to me at all. When you buy on aesthetics, you also often pay a significant premium for the looks. Fins like the SeaWing Novas and the Mares XStreams are VERY, VERY expensive, and (in my opinion, anyway) have no qualities other than cool looks to justify the price.
If you have to have blue, I'd highly recommend finding a relatively inexpensive, plastic paddle fin to dive, something like the Deep See Pulses. They're perfectly functional fins at a low price point, and they will do you very nicely through your class, and any initial warm water diving you might do. If you decide this sport is something you love for yourself, you will eventually figure out what kind of diving you really like, and you'll end up with fins that work for you for that. Most avid divers have more than one set of fins, I think.
Oh, and confession time -- I bought split fins when I learned to dive. The first time I got to dive a good set of paddle fins, the splits went on the shelf until I eventually sold them.