I don't think you are giving inexperienced people very much credit. It is not that hard to read a paragraph on each type and go from there.
I'm probably generalizing my own opinions here, but I know whenever I start playing a new game - whether an RPG, a board game, a card game or a video game - the fewer choices I need to make before the game itself starts the better.
Sure, the new players will understand it if you add a few paragraphs of information, but will making that choice improve their first game in any way?
If not, make the choice for them and leave it to advanced players to change the default.