I've been to Canberra by train once! It's was a pretty good trip from Goulburn, I absolutely enjoyed it! The people on the train weren't too load at all, normally the train is pretty good after leaving Goulburn! It can be quite load from Sydney to Moss Vale or Goulburn!
I stayed at a hotel in Kingston, I didn't enjoy staying at the hotel after I stepped into something in the shower room and the owner didn't give too hoots after telling him the next day! I felt like smacking the crap out of the C. And they refused to give me a refund as I was entitled to hence NOT happy with my stay! My feedback wasn't good for Booking.com, they didn't post my feedback about the hotel on Booking.com which is a pity
While I stayed in Canberra, I was pretty much walking everywhere! I caught the bus around 4 times and I didn't get back to the hotel until 10 pm and then had a sleep for awhile and by the time midnight came I went out again and walked around the city area looking for a place to eat "It took me until 1 am to find Macca's" hahaha
Then I went back to the dumb hotel, around 4 am or 4:30 am then went to sleep again, and woke up at 6:30 am and left!
My advice is "Don't get a hotel in Kingston" although it's pretty close to bus stops and places around Canberra to get to by walking! When I got back home in Goulburn, I wrote to Canberra city council and the government asking them to get a train network to make life easier. I originally suggested Canberra should have metro rail or elevated rail network! Not trams as it's happening now! TOO LATE, I THINK!
All I can hope for you, is don't go to a hotel/or motel with a shared bathroom/toilet avoid them! Get a room with an ensuite bathroom/toilet! And have a good trip