Tutorial or guide through customizing wordpress woocommerce theme

I am a PHP developer and just started doing some work with wordpress so I am a newbie on the subject. I have created a site using woocommerce and seems to work ok, but I kinda struggle when trying to modify the templates to match something specific. I would like someone to guide me through teamviewer to help me customize a site to look like, eg [login to view URL] so I can get hold of how to modify a template or create it from scratch if necessary. Thanks for your help!