how do I start?

I’m interested in making a game, but I have no idea where to start. like where do I even make a game? and where can I learn coding? I wanna make it 2D but some of the characters may be 3D from a 2D perspective. should I start by making a storyline? I alr have an extremely loose idea of a weirdcore game featuring a star character with a dream within a dream kinda theme. I want it to be relatively similar to Deltarune but with less fighting mechanics. I’m not sure if I’d wanna do full voice acting or songs and cutscenes or multiple endings or not but they’re in the cards.

tl:dr how do you start with creating a game?