Starting in 1066 is fine, but you should play one of the two petty kings, not an earl.
The concept of Ireland being "tutorial island" also dates back to the early versions of the game, when 1066 was the earliest start date and there were no tributary wars. Now the best start for a newbie is probably a duke in the HRE. Though the learning scenario as Alfonso of Leon is also a good choice.
Thanks for the tips. After taking everyone's advice I decided to play around a little with a few starting choices like a HRE Duke and Alfonso etc... Made me realize how little I know, for some reason most "beginner" guides also take place in "newbie" Island and so when I watched them and learnt how to play (or so I thought) I didn't even consider it was not covering the larger scope of the game.
Now that I have forced myself off the island and started trying different starting zones that game has really opened up. Don't get me wrong, I get lost as I am unsure of what to try and achieve next and even when i decide I am unsure of the best way to go about it... Usurping a King for instance.
Luckily I found a few Youtubers who upload high quality current content like Ghostfeet. I understand the games scope and what it achieves a lot better now, I am no longer looking for hard and fast rules or tactics per se but want to learn what is actually possible which is a fun process. The more I learn the less I feel like I am waiting for something to happen.