I believe you can catch perch, pike and even trout there.
But it might not be the best time of year. At the moment it's very touristic and hot.
Finding the fish could be a problem, it's a big lake.
You'd probably have your best chances fishing in deeper water.
Best if you can organise a boat (with fish finder if possible)
Or perhaps try night fishing.
a snapper a day keeps the doctor away