Welcome to HBT. I use a lot of Cooper's cans to make many different styles. The OS lager comes with an ale yeast,so it's really a light pale ale. Even adding 2lbs of plain light DME & 1 or 2 ounces of hops will improve it immensely. Keep the ferment temps down to 64-70F for cleaner flavor.
I got the OS lager with my Cooper's micro brew kit,& it got down to FG & fairly clear in 12 days. Your results may vary. It's also a good idea to let it sit another 3-7 days after FG is reached to settle out clear or slightly misty. It'll clean up by products of fermentation at this same time.
This can take 3-4 weeks total,so 1 or 2 weeks may not be enough time. Only your hydrometer knows for sure. And 3 weeks is accepted minimum time to carbonate & condition at 70F. 4-5 weeks for mid gravity ales is more realistic for prime flavor & carbonation. Also,give the bottles at least a week in the fridge for longer lasting carbonation,thicker head,& better clarity. 2 weeks is def way better in this regard.