as a beginner you want to find what weapons you like most, and then find a character that has two weapons you can use easily. I suggest fast easy small combo weapons like spear, sword, hammer, or even axe.
if you want to get technical, most beginners will use signatures very often and wont utilize spacing. this isnt particularly bad if you do the same, but its something to avoid. being the most aggressive is what will usually get you the win in beginner vs beginner
ragnir is definitely one of the most aggresive legends, with signatures that cover lots of range with little time for an opponent to react.
it ultimately is your preference, though