If you want to become a Software Engineer or a FullStack Developer you need to learn Programming.
If you want to become a Software Engineer. You should have learned programming languages such as,
Python
Java
JavaScript
And Specially Linux Terminal Commands which is Bash.
If you want to become a FullStack Developer (WebDeveloper). You should have learned programming languages such as,
HTML
CSS
JavaScript
PHp
*You can Learn all these programming languages using https://www.sololearn.com
(Not Sponsered)