I think the answer is both! I think starting off on the right foot is the best way to go as far as accounting goes. An accountant, cpa or bench.co can get you started and setup on Xero the right way. Then its up to you if you want to continue with them or not.

I would also consider a design update as well with "Calls-to-action" that are clear and easy to spot. I love and recommend optin monster (https://optinmonster.com) mainly for A/B testing, multiple types of optin variations from lightboxes, bars at the top/bottom, after post, slide in and my personal favorite is their exit-intent. Exit intent allows you to show a lightbox as the user is leaving to push something one last time.