How to start software development?

Hi everyone! I have just completed my high school and I have leisure year to prepare for college I will pursue management from a very reputed institute but I really wanna learn coding due to lack of knowledge I couldn't pursue computer science but now I wanna change that before my college starts I really wanna know the basic so I can work on stuff during college so please recommend me some free courses on YouTube or any platform or even a roadmap would help also I am ready to put hours so please help me with this endeavour. Thank you everyone