hey am a tunisian highchool student that wants to learn how to code

Having been interested in computers since a kid (I am still a kid even though I am 17 years old) and summer is here, so I searched the internet for software engineering, computer science. there is many things many many things. So I've decided to learn coding. I already have some knowledge of coding from school, like variables.. i want to know what way is best to learn coding is there like a good course cause i saw plenty courses and didn't know which best way to learn, i will appreciate you help thank you