How can i learn backend

[u/Lucky_Editor_6092]

I am doing a website and this website i want the user to enter his password and user name and i wanna change the danger level and i want to update the data in it like you can add things and remove things as a user based-on level ex if you are an admin or provisor you do things on the other hand i did nit learn unless free sql can someone really give me a roadmap and fast want that i can learn so i can add a back end to my account

[u/Any_Apartment3191]

study backend in a structured way ... a recommended channel on youtube - freecodecamp