Rezca
The Greatest Jaggi
Thanks for the reply. Especially on how to make the game harder. Although, funnily enough I am actually worried about making the game too difficult for my self. Like, ignoring the fact that there are all these new things to learn like all the new mechanics I basically just returned to Civ after a year or so of not playing and my current skill level just about allows me to beat a game of vanilla on Prince. Just about.
Adding Flexible Difficulty can make the game more 'balanced' in that if someone is snowballing it'll make things harder for them - unless you literally have the game sealed, in which case at that point it hardly matters anymore without Revolutions enabled. If someone's falling behind a ton - which has happened to me a few times, especially when being shafted by the map generator - then it makes things easier for them. So it's less a tool to make the game easier/harder, and more one for attempting to regulate it.
The reason AI don't do well with the Great Commander option is because they stop settling their generals, and use their new commander sometimes to just sit in a city or even scout with it. On the other hand, you can make your invasion stack nearly immortal once the commander's leveled up enough.
Right now - at least in my experiences - the early game is the roughest part, especially if you've got AI neighbors nearby that are prone to aggression. So starting the game on Chieftan or Warlord with Flexibile Difficulty might be a good choice. Or giving yourself an AI teamate in the custom game options xD
Starting on a low difficulty gives you a brief chance to research and possibly expand a bit at the start before Flexible Difficulty kicks in and starts pushing you up to Noble or such. The AI will be quickly catching up even without flex.difficulty, so don't worry about the brief easier start.
All that said, don't be afraid to experiment a bit. There's a lot of options for AND so there's many ways you can play it ^^