Is there any better theme or something you people know, Which can help me about make responsive classified website?

Many Thanks...

Good afternoon everyone,

I am a Software Engineer intern. From last few years I listen about UX & UI design.
After understanding what is UX & UI, I want to build my carrier as a UX professional. But the problem is i search in internet about UX books for beginner but I don't found much info from internet.

Anyone who knows more about it please give me info or any link, It will be really helpful for me.

Thanks.