How do I get started with OAT prep?

Hi all! I’m a non-trad looking to take the OAT and apply to optometry school in the near future. I took all the science classes in undergrad but it has been a few years since graduating. Where do you all recommend I begin? And which resources do you recommend I use?

I hear a lot about OATBooster and OATBootcamp, but do you all think one of these is better than the other? How long should I take with my prep, and what overall study plans have worked for you all?

Thank you in advance!