I got switched so it's complicated
Like for example when it comes to writing, I'm righthanded while writing with pen and paper, but if writing with a marker on a whiteboard then I'm lefthanded
But yeah to give a proper answer to the question, I'm naturally left-handed, but I was switched to using my right hand in kindergarten so I do quite a few things with my right hand (including writing with pen and paper, although I can write with my left hand, just slower) but other thing with my left hand (including the white board writing from earlier), and had I played as an American football quarterback, I would have been a left handed one.
I guess naturally left handed but would probably argue right handed here because I got switched to doing the most important tasks with my right hand when I was like 5.
I wouldn't really say I'm ambidextrous as I tend to do most things with one hand or the other and struggle with the other one in many tasks.