My options seem to be this…
1) Build the whole cart from scratch into my current theme (which seems quite daunting, not sure how easy this will be)
2) Use a woocommerce theme, back up my current one, then start going into the new theme and changing it to match my backed-up theme.
3) Any other way?
Would love to hear some advice from someone that has worked with WooCommerce, and what the easiest way of integrating the plugin to an existing site would be.