Never played a Might & Magic game before, but i really want to play this one. Will it be too much trouble to get into?
Also what games of the series you guys recommend?
I've put my main recommendations in bold.
Might and Magic I: Secret of the Inner Sanctum - Lots and lots of grinding. Very slow pace and lots of frustration due to poorly thought out save system. Still playable though. Definitely the one you want to play if you want the early RPG experience.
Might and Magic II: Gates to Another World - My memory of this game is very spotty.
Might and Magic III: The Isles of Terra - A really drastic shift for the game. Still at basically the forefront of tile-based dungeon crawlers, the game will feel very familiar if you're comfortable with those. There's a pretty big variety of items and classes (due to the prefix/suffix system), especially when put in context of when it was released. The interface is balls though, and it gets grating towards the end of the game. There are also some weird design decisions that will only be addressed much later in the series (such as the startling frequency with which items break and the relatively laborious process involved in repairing them.
Might and Magic IV and V: World of Xeen* - Great game. A huge variety of... everything. Variety is really the name of the game here, with a truly staggering number of items and environments. The mainline plot is rather long, and you have almost total freedom as to how you choose to approach it. Want to skip a long and involved quest by teleporting through a door? Go for it! It has basically the same gameplay of III, which is both good and bad: Good in that III's gameplay is really fun, and bad in that it imports the annoying interface and occasional odd design choices, which are exacerbated by the game's length.
Might and Magic VI: The Mandate of Heaven - Another great game and another big shift for the series. Most notably, there are no longer tiles, and the game is in real-time. There's also a skill system now and a venerable explosion of items. It's also totally massive, with a ton of dungeons, places to go, and quests. There's a lot of freedom too, although not quite of the quest-breaking kind seen in World of Xeen. The interface is pretty good now, and most of the design relics (like the aforementioned annoying item breaking mechanics) have been revised. It's tough to describe the difference in scale between VI and the previous games in the series but it's huge.
Might and Magic VII: For Blood and Honor - Remarkably similar to VI. Freedom is reined in somewhat in the name of a cohesive narrative, and there's an emphasis on big, game defining choices that didn't exist in VI. Fundamentally the same game though.
Might and Magic VIII: The Day of the Destroyer - Retains the base gameplay of VI but there are drastic changes underneath. For starters, you create only a single character and, from there, must recruit additional followers. This change ends up being mostly superficial due to the fact that there's no real character-based roleplaying (they don't speak) but it's worth mentioning nonetheless. The narrative is also far more linear, although the big decisions of VII remain. The fanbase is a little divided on this one, but I would personally put it on the same level of VII.
Might and Magic IX: The Writ of Fate - Don't play this game. It stinks.
* - IV and V can be combined into one game and can only be properly finished when combined.
My M&M recommendation summary basically amounts to whether you want a tile-based game or a real-time game. If you want a tile-based game, play World of Xeen. If you want real time, Might and Magic VI is your game.
EDIT: This guy does a pretty detailed summary of the series that's an interesting read.
http://www.hardcoregaming101.net/mightandmagic/mightandmagic.htm