I would suggest that you make small deposits and play a few to get the feel of the casino. MG has a fairly equal amount of high, medium and low variance games.
It's difficult to recommend any slots as one day they can be hot and then they can be cold, actually for longer than a day.
But a couple of my favorites were Adventure Palace and Mayan Princess, Boogie Monsters, multi line bonus slot, Cash Crazy classic slot and City of Gold. There are others, but since I have quit, I can't remember, so hopefully others will add their choices and experiences.
But just dip your toe for awhile till you get to know the slots better and become comfortable playing. MG was my first choice of all the softwares.
To bad though the new US MG doesn't offer the fun mode.