Which Languages Should I Learn To Start Design A Theme For Cs-Cart?

Hi Everyone,

Yes it's not late for me i know many things in Php, Html, Css

But i want seriously learn everything to start using what i learnt with cs-cart and start designing my own themes for people here,

Any good, Kind advises from the people of cs-cart who learnt before ?

How to start please? And which resources you recommend it for me please?

Best Regards.

Please check the following article