I have completed html basics but how can i learn more like style sheets , SVG,

Answer 1

Go to : w3schools.com and learn

Answer 2

I would recommend finishing the CSS course in SoloLearn. SoloLearn also has a Bootstrap series, but so does w3schools. w3schools also has Font Awesome. CSS Tricks is also a good reference, although some article are outdated.
https://css-tricks.com/guides/
https://css-tricks.com/almanac/
https://css-tricks.com/snippets/css/
After you have a solid foundation in CSS, you can learn about preprocessors (SASS/SCSS, LESS, etc.). They are all pretty similar, so just pick the syntax you prefer.