My tins are about 26cmsx10cms and about 8cms. deep. I think they are cake tins actually. As I said, for just the two of us, I cut the loaves in half (they fit better into the baskets of the deep-freeze that way too I get 16 halves into a basket if I make a full load). Let them cool right down before freezing - in summer, if the flat and the balconies are warm, I sometimes put them into the freezer basket in the cellar for a bit. Makes it easier for the freezer to get them down in temperature if they are cooler to start with.
Just don't worry about bread making. It's great fun. You'll see the holes in the dough as the yeast takes effect and you'll notice the difference in texture and weight too as it gets 'bigger' and lighter.
As a side effect, everyone in the block of flats loves the smell and it does wonders for the 'wow, you're foreign and you can make your own bread' reaction.
Good luck and less us know how you get on!