If your gear is not that strong, I recommend bottom fishing for char, bream, and burbot.
You can get really good EXP and money from bottom fishing for char. Use a fluorocarbon leader; no bigger than 7 or 8 kgs, a small hook; maybe a size #12, and mayfly larva as the bait.
At night is when you should fish for burbot. They live in deeper parts of the lake. Burbot like live bait, worms, and fishy things. So pieces of fish, nightcrawlers, frogs, and live bait are all good. I would recommend a fluorocarbon leader between 10-15 kgs, and a large hook #4 - #1.
A basic GB that might help with Burbot fishing is something like this: feed - bloodworms - chopped worm - biscuit - fish oil
I also think you should check out rf4spots.com it is a great resource for finding spots to fish as well as what people are using to catch them.