[member="Akuma"]
You don't have to use an actual lightsaber to have a frame of reference for using a sword. You can study old swordsmanship manuals online, watch Kendo or HEMA sparring videos, do a bit of historical research, read a sport fencing book or two. You could perhaps lean on martial arts training in real life; unarmed combat has a lot in common with armed, believe it or not...for example, the footwork in Karate and Kendo is very, very similar. Maybe even take up HEMA or Eastern martial arts if it tickles your fancy.
I have never used a sword (hopefully I can find a saber and/or longsword class one day) but I have a bit of Kali (Filipino stick fighting), Karate and high school wrestling. That coupled with a little research gives me a frame of reference.
On another topic, as another person said, dragons and magic katanas are immersion breaking. Yes, Sith and Jedi wielded metal swords....around 25,000 BBY. It's 800+ ABY and, well, katanas are a giant anachronism. If you well and truly desire to wield one, okay, but as we are saying, it spoils immersion. It's not just metal swords in the future, either, but rather a bunch of things on here that I have found which are super out-of-place.
I am trying to be nice about saying it, mind you. People get upset when they perceive something to be critical and thus attacking them personally. It's just irritating because people always simply ignore whatever they don't like when people politely and articulately say things. Eventually, people get frustrated and then are told to calm down and not take it so seriously, it's just fanon and you can do whatever you want etc. Or they are told to leave if they don't like it instead of amending things which don't make sense in a given context.