Hello all,
Thanks a lot for your comments!
I took your combined advise and went to my LDS of choice and it turns out that they are happy to spend some time with me in the Lake before I head out soloing.
Also, they had very neat underwater maps, showing all the uw structures and uw training facilities, depth profile etc, which will help a lot.
Also, they warned me where NOT to go (there is a big ass water intake that feeds a big waterfall nearby) and its on their diving maps. That one piece of advise is probably the BIGGEST benefit from talking to them.
So in a nutshell, i will be heading out with a professional at least once to get to know the area, focus on self sufficiency and to learn where NOT to dive.
Again, its not deep and I am a pretty confident diver, but even 1 ich of water can be deep enough to drown if you cant get up (for example because you get sucked into the water intake described above)...
Thanks and happy diving
Chris