Have 2 years ago Mass Effect 3 played, but not part of one and two, which I'll get to now. Part 1 is in my opinion the best part of the trilogy. Graphically and super forth by the operator, language and cut scenes very well. A really good introduction to the trilogy, you get Insights into other worlds and their inhabitants, and the existing latent threats to the galaxy. Commander Shepard has drawn hergvorragend and can influence the game through its decisions, the other characters are well represented. The difficulty with "light" is not very high and can be easily mastered by beginners. In Mass Effect 2 and 3 the difficulty but also on "Easy" much higher. Here possibly can help a coach or a savegame editor.
Would recommend to anyone interested all 3 parts of the trilogy to play in order to exist, the entire scenario.