Yeah, you are on the right path.
I have also choosen HTML language and it is awesome.
*You can use some websites to improve your coding :-
Free code camp
W3 SCHOOLS. etc.
(You can search to Google for more)
*If you master Html, you can become a front end developer. And can make your own website.
*Sololearn is best for learning any programming language, there are many experts and people who can help you. (Any doubt you can feel free to ask me).
Hello fellow beluga enjoyer
But here are some of my suggestions:
(Back-End) Server side: PHP, JQuery, some SQL language, and Python
Software developer: Atleast Python and probably Java and C(++)
Generally, C++ is used for developing operating systems, system applications, games and databases. Java also can used to develop the same and also is used to develop mobile applications and clients-server applications.