Easiest way I believe is to get married in Morocco, register your marriage to be legal in Finland, as previously advised. The amount of paperwork is a lot, you should know the procedure in Morocco, and your wife-to-be should know being a Finn what is required. There is not really a shortcut to this.
The waiting time for visa from Morocco can take minimum of 6 months (have known once case).
Contact the Finnish Embassy in Morocco, they are able to advise you precicely.
