Ok….first… let me say this…. that person with the buyers remorse…. is only for that person. Go sit on the bike! Your body composition is different. Your level of maturity is gonna be different. Your idea of comfortable is gonna be different. Your riding habits are going to be different. Yet you think your outcome is going to be the same ?
Still go take the MSF course. You got a good jump on the dirt bike but I would still recommend some street training. For the same reasons rolling blading is different then ice skating.