Where should home button be on website?
Result: They're looking for an easy way back to the homepage. Provide them with an obvious "home" button or link. Placement should most likely be in the header or main navigation.
Should primary buttons be on the right or left?
Full page designs should have the primary button on the left side of the page. If the browser window is large, or you have to scroll down to fill out a form, it's best to have the primary button right below the last bit of content on the page.