General Tips
From Azur Lane Fan Wiki
These are general tips. Remember, I am writing them as a late-mid game player. At the time I draft this, I have only 6 ships to 125, 1 more to 120, but a bunch over 100.
Make use of Tier Lists. I'll link a few below.
Tier Lists
Azur Lane Community Tier List: https://slaimuda.github.io/ectl/#/home -- probably the best
Pocket Gamer Tier List: https://www.pocketgamer.com/azur-lane/tier-list/ -- the first one I used
Azur Lane EN PvP Guide: https://docs.google.com/spreadsheets/d/1BewmBsf4EWKAf_UwYax05c7ksL51y6sjs96pIwD73Jc/edit?pli=1&gid=1356744907#gid=1356744907 -- useful for building exercise fleets