When you use scissors, in my experience, the only part that you have to figure out is starting the cut which means dealing with the fact that the handle is in the way. Once you are past the handle, the rest is easy.
Der's point about small cuts deep into the scissor is important for starting out as you are avoiding the handle.
I cut from the scissors being under the handle to start things out. This is so you are not pulling the rubber up away from the blade. If the scissor is starting the cut from over the handle, it pulls the freshly glued rubber up off the blade.
Once you do it a few times, you figure it out and get used to it. I find cutting with scissors so simple that the hassle of using a knife, a razor, a scalpel, or an X-Acto not to be something that interests me although, before I got comfortable cutting with scissors, I liked using the knife method with X-Acto knives. It is easy to get a decent cut with one of those even when you have never cut rubbers before. But you need a cutting surface. And to me, it is a bit fussy. And once I had done a few with a scissors and was confident, I found it is so easy, other methods didn't seem worth taking the extra time.
I just use scissors that are sharp. It does not really matter what kind.
I use these:
https://www.quill.com/westcott-titanium-bonded-8-titanium-multi-purpose-heavy-duty-scissors-sharp-tip-gray-yellow-13529/cbs/059312.html?effort_code=369&sfcp=1&gclsrc=aw.ds&cm_mmc=SEM_PLA_SMART_OS_N_059312_N_N_HIGH&mcode=SEM_PLA_OS_N_059312_N_HIGH&gclid=CjwKCAjw9e6SBhB2EiwA5myr9kBVG2-BSjjHs05V7jdbL4Q-GQ1Iwx5nXXR1unIzEYCx6tKUKwD2WxoCxJEQAvD_BwE
They are darn sharp and work really well.
Also, water or oil on the blades of the scissors (or Der's licking the scissors--I have seen Der do that in person) does make it cut cleaner. It seems like that should work with the knife cutting method as well since the principle is the same. The water, oil or saliva would make it so the rubber won't grip the cutting blade....so the cutting blade glides.....like why you would use shaving cream.
So, you don't need any specific kind of scissor as long as they are very sharp....at least, that is my experience.
What convinced me to get used to using scissors at first was, at this club I played at in 2009-2012, I saw the guy who ran the place cut a few rubbers. He used a scissor. It took him seconds. He had done so many, it literally took seconds. And the cut was perfect. He showed me how he did it and after doing a few, I realized how efficient it was with a scissor even if I will never be as good or as fast as he was.
But, however you choose to cut will work.