Abha Hoda Jaan,

The best tool I recommend is pluralsight, sign up for a trial and if you liked it, I think I have a code I can give you so you get one year free.

Here are some of the courses on pluralsight.that I like for UI/UX Design:

Pluralsight Trial

UX-driven Software Design

Hacking the User Experience / UX for Developers

Making Sense of UX and Design in the Enterprise

Also let me know what is your learning style? Videos, Podcasts, Books, Online articles?

yeki az hamkaram faghad doost dast weblog bekhooneh, He hated Video courses. let me know

UI, UX: Who Does What? A Designer’s Guide To The Tech Industry