I want to become a game dev

As the title suggests I want to become a game dev but don't know where to start. I know about three game engines unreal unity and Godot but only unity works on my pc. I don't have the money to upgrade my computer right now but I just want to become a game dev and unleash my imagination. I know c and cpp because of my highschool but that's that. Idk where else to find resources or where to start. Plz someone guide me