Little Details

I'm having trouble with this query, as if I try and google "fraternisation" and, indeed, "non-fraternisation" (also using a Z), I get information about the military, which isn't quite right, and besides I know it isn't the right word, but I'm not sure what is.

Anyway! I've got two characters who are both police officers. They're partners - they work well together, they like each other, their relationship is friendly and above board. I can't find out for sure, but I'm guessing that there would be rules prohibiting them from pursuing a relationship with each other. That's not the case with my two, but it makes me wonder: would there be any rules about a brother and sister being assigned together, or can I go ahead with this set-up?

We're talking present-day Canada, but in a rural setting where it might be easier to bend the rules. Any help would be appreciated.

I'm working on a story which requires extensive traveling across Europe in trains with sleeing cars, and I'm searching for the routes they may take. Most of the lists of routes I've found so far are restricted to within a country. How would one take trains with sleeping cars between these places, assuming that's possible:

-Paris, France
-Elbasan, Albania
-Armenia
-far northern Russia, close to the tundra (The location they're seeking isn't near any cities or towns at all, so as close as possible, at least. For purposes of plot, I can stick this mysterious location anywhere depending on where they'd get off the train.)

I highly doubt there would be routes between all these places, so they'd probably end up switching trains quite a bit. And getting off of trains that aren't exactly at the place they want to end up. Closest approximation, at least.

Also, how long would they spend traveling between Point A and Point B? And how long do they typically stop, if they stop? I need to know how long the routes would take.

Railroad operators and train names would also be appreciated, if they can be found.

Thanks for the help!

I have a character who is an excellent player on acoustic guitar. What kind of learning curve would I be seeing if he decided to pick up an electric? He's played electric once or twice, but not in years.
I've tried Google, but I can't really come up with a search term that doesn't just yield beginner guitar results. The guy is a PHENOM on acoustic, he's definitely not starting from scratch in technique. I'd be just as happy to hear personal experience as links and such.

ETA: thanks for the responses! I just wanted a basic idea and this will really help launch off any further research. Appreciate your time and thoughts. :)