Integrating Fullstory

Site URL: https://www.doctorsorders.xyz/

I'm a website newbie and prototyping a project in order to do proper customer discovery. I am on a monthly Personal plan on Squarespace... and my current plan autorenews at the end of the month. I want to put Fullstory on my site -- there's some Squarespace-specific guidance on https://help.fullstory.com/hc/en-us/articles/360020624374-Squarespace -- and I want to do it today (which sounds like something Veruca Salt would say). I was told that I unfortunately need to wait until my autorenew date in order to upgrade to a Business plan and gain access to Code Injection, which isn't available to Personal plan. Question is... is there anything on https://help.fullstory.com/hc/en-us/articles/360020623514-Installing-the-Fullstory-Script (remember I'm a website newbie) that might allow for another way than Code Injection? https://support.squarespace.com/hc/en-us/articles/205815928-Adding-custom-code-to-your-site#toc-ways-to-add-custom-code is more information about what's available on different plans in case it's helpful. I'd really appreciate any advice or guidance anyone could provide.

Thanks, @paul2009. Is it right that I can upgrade and just get a prorated charge for a partial month of the difference between Personal and Business?

Never mind. I see how it works. Thanks for the help, @paul2009. I didn't think the info I got from Customer Service was right...