Guys I want to do a full on proper US run for my 1st time. Meaning I want to take my time manifesting my destiny and not necessarily rush things. I intentionally kept on the side a British Empire save where I formed a solid Thirteen Colonies colony, for later use. This save is around early 1500s I think.

My question is: Will I have time to form irl US's borders and also engage in external politics and influence by 1821? Or should I go after Extended Timeline for a (much) longer playthrough?

Also, any recommended idea groups for historical Burgerland?