Just watch some Flamu. If you actually pay attention to his videos and what he is saying then you will always pick up a few tips and tricks with each video. He has many cruiser game plays from various nations.
Edit: After looking at your stats and noticing you enjoy IJN cruisers. I'll give you a few tips on my playstyle.
Always use your concealment, it is one of your strongest tools as an IJN cruiser. Every single game I always escort my dd towards the cap. Try to put your concealment range bubble about 35% of the way into the cap. You will be close enough to support and still stay hidden if radar ships are nearby.
When you are about to engage, turn your ship away from the ships you are about shoot, so once you are spotted and they begin returning fire you will be in an excellent position to start kiting (Sailing away from ships) and firing back.