FWIW RoA isn't necessarily hard in the way that you run into enemies, that turn the game into a constant reload fest. For the most part, combat is managable and so is everything else, once you get a grasp for how it works. Puzzles can be a bit tricky at times, but nothing you couldn't look up, if all else fails. The difficulty comes from the complexity of the game and a relatively high (although not punishingly so) learning curve at the beginning. For example, I switched to RoA directly from MM4/5 and was wondering, if my party would ever be able to regain health lost back (it will be, actually).
Now, the series is still approachable in its complexity, it's just really in love with detail and a bad fit, if you just want to hop into a game and play around. However, if you're willing to dedicate to the series a bit, it actually might be a really good fit for you, since character customization is a very strong point of the series imo.