Does the site linked below cover issues with the ERAS II mod? I am looking for a site that covers the game and has some pointers. It is a tough, but wonderful, game.

http://www.piratesahoy.net/forums/theblackknights-mods-and-guides.174/

That link?  Not really.

Looking at the list of topics, they are stale and outdated.

How to adjust your 3rd Person Ship Camera is now moot because we've added sliders in the Options to adjust FOV both at sea and on land.
The Guide to Current Quest functionality is moot, because all of the deficiencies it lists are long fixed.
The extended mooring in Port Control is now moot, because we've changed it to be unlimited in ERAS.
The Improved GOF Crosshair is moot, because we've added both a different crosshair and actual direct aiming, instead of manually figuring the arc by experiment in first person, if you possess certain gunner items.

Much of the rest in that sub-forum is how to modify certain textures and such, that don't apply to actual gameplay/advice.

For quests, ERAS adheres to most of the COAS guides for those, and a good site for that is:  https://sites.google.com/site/skodacoas/home
See the links for Important Quests, Nation Quest-lines, Random Quests for guidance/walkthroughs

For general advice, I'm uncertain what exists.  You can always ask people on our Discord:  https://discord.gg/5S7sr5q

Our website ERAS topics:  https://buccaneersreef.com/forums/forum/gof-historical-eras-module-2-download-di...

Some of our COAS (City of Abandoned Ships) advice/topics, which applies to much of ERAS:  https://buccaneersreef.com/forums/forum/age-pirates-game-forum/

This last one includes tips for sword fighting, quests (linked mostly to that skodarap material), tips for how to play starting out new, etc.

I believe MK had been working on a more thorough guide, but I'm not sure his progress or what state it is in; I will contact him about this to see where that stands.