Excellent choice for a first bike. I also live up in the North of Europe just across the Baltic from you and I can confirm that you made a wise decision. Having a cruiser is very sturdy at top speed. Since it is a basic style bike there is not alot of expensive maintenance to do on it.
I also have a Beach cruiser, was lucky to find a Schwinn up here. Cruisers are the best bike for winter riding which is about 9 months of the year, and Front wheel drive even better. Great traction in Ice and Snow as long as you have spike tires. I ride my bikes in blizzards, over unplowed snow, frozen lakes, pouring rain etc, all weather conditions and that bike still going strong since 2009. Mind you I have switched to lipos now but the motor and the bike is still the same.
Now I have built another ebike, which is fancy aluminum mountain bike with all the bells and whistles but I seem to still like my cruiser for the no stress e-escape!
Good luck and keep us posted.
Edit*: For wires I use a piece of motororcycle innertube and stuff the glob of wires into it. Very effective in hiding all the wires into on spot. I also put the controller underneath the seat with wires facing down to protect the controller from being damaged by water.