mobile usability issues

Google tells me that there are elements too wide for a page, that some clickable elements are too close together and that some text is too small to read.
I am using the twenty twelve theme.
I can’t find out how to identify which page elements are throwing up the errors so I can’t put it right.
I feel maybe the sidebar menu is smaller text than it should be and close together but I’m not sure how to alter this.

I am new to WordPress and do not know much code.

• This topic was modified 2 years, 5 months ago by debbiewaller.

The page I need help with: [log in to see the link]