Start with html and css..just as JustMichael has said follow that guide and in no time you will be making sites eazy peezy..I would suggest you take a look at the following.
YouTube Channels:  1. CleverProgrammer.
                              2.WebDevSimplified.
                              3.ProgrammingwithMosh.
Websites: 1. https://www.w3schools.com/js/DEFAULT.asp
              2. https://www.codecademy.com/learn/introduction-to-javascript
Also try reading the documentation of those languages it helps.