First off welcome!
As for suggestions pretty much anything is possible now from being King all the way down to a vagabond pickpocket.
Your legacy is literally what the game is built around. Each generation you have a child and your spirit takes control and you live out successive generations. Think a 3D version of games like Crusader Kings or old school games like The Guild.
You can be a merchant prince, a warrior king, or even a pirate. You can create medicines to stop a great plague or design the greatest sword of all time.
SBS is adding in player skill to almost every facet of the game. From how you swing your blade to how you make that blade. Now until the public gets their hands on the core game we do not know how effective or how expansive each core system is. Until we do no one knows just how much fun crafting or combat will be given the new perimeters SBS has chosen to follow.
So for now decide what you’ve liked best about past games and hope that line is fun enough to hold your interest. However even if for some reason it falls short no reason to reroll or bail on the entire game. Just reincarnate and follow a different path.
Coe is less of a game and more of a world where we can be whatever we choose.