What kind of upgrades to a BMC AC02 hybrid?
The best upgrades would be a set of clipless pedals, compatible shoes, and some nice cycling clothes and helmet. And maybe a good set of lights. You can carry all these over to your next bike. 

Another nice upgrade is a bike repair stand and a basic bike repair toolkit.  

Finally, a good GPS bike computer or GPS watch will set you back a few hundred dollars. 

I think you get the idea. There are no "upgrades" to an essentially new bike itself that need to be made. Only buy things that will encourage you to cycle more (Strava premium membership!) or that you can take with you to the next bike.