If you are looking for how to play this specific version, here are the major highlights and changes introduced in the 3.6.0 update:
Files labeled with "Incl.ALL.DLC" from unofficial sources often carry risks of malware or miners. It is highly recommended to run a full system scan if you have already downloaded it. File: Stellaris.v3.6.0.Incl.ALL.DLC.zip ...
This version introduced a major overhaul to naval combat. Smaller ships (Corvettes/Frigates) became more viable against capital ships, and the "minimum range" mechanic was added to many large weapons. If you are looking for how to play
Saves from version 3.5 or earlier are generally not compatible with 3.6 due to the massive changes in ship logic and traditions. These are small, specialized ships designed to carry
A new ship class, the Frigate, was introduced. These are small, specialized ships designed to carry torpedoes and hunt larger targets. Troubleshooting & Technical Notes