Start now. We set Stcki up for you. Your private setup link comes by email, usually within 15 minutes. On it you sign, pay the one-time setup fee by bank, check what we found from your website, and send us your counts. Then you go live, and your monthly subscription starts that day. A call with Jason is part of onboarding: once you've signed, he emails you to find a time.
Talk to Jason first. Jason emails you to set up a quick call about what you're running today and what you need. After the call, he sends your setup link.