So I got bit by a bug of an idea for a game I hopefully want to make for an eventual portfolio or to sell open market. Unfortunetly I have to admit that I am pretty much starting from scratch on the programming side. I am switching gears from medical to computers and am back in college to get a degree, but that is still 4 years from now.
My eventual game will be a sprite based 2d action adventure the same type as classic zelda games such as "link to the past". However I plan to add a much more freeform world sandbox playstyle in the vein of Skyrim and other sandbox rpg games. I also plan to add things like crafting and enchanting. Basically a bunch of stuff I haven't seen any isometric 2d sprite or 3d model game do.
So my question is, is there a good action adventure engines out there that can handle a lot of custom modding or would it be easier to just plan to eventually build my own engine?