Hi @Lee! Definitely not a bad choice with Cozy, but there are certainly other options out there that are probably better suited for what you're trying to accomplish as an independent DIY rental owner (and also completely free with more capabilities than Cozy).
There are a lot of tools that can help you to self-manage the rental process. Aside from providing the basics (ie. listing capability to get the property published to 10+ major sites; scheduling tool to schedule viewings, etc.), you can also establish your own tenant screening process. With comprehensive applications -- including pulled reports from TransUnion and nationwide criminal background checks + credit score + full credit history breakdown + eviction history -- the right platform should make it as seamless as possible for you if you're managing on your own. Depending on the tool you use, it can be a great way for the prospective tenant to only need to pay an application fee once (which would include current credit score and a breakdown of their credit history, nationwide background check, and eviction history). This way, if they don't successfully get approved to lease your rental they can still take that application and apply for another listing without having to pay for another app within the time frame of 30 days.
Contactless (online) payments is a big deal given the current state of things during C19, especially with the right platform that allows your tenants more options (ie. debit/credit card option, ACH payments, or even expedited payment processing, along with rent/payment due date reminders, and the ability to report positive payments to TransUnion in order to give your tenants' credit scores a boost; this acts as an added incentive for them in the long run as well). Either way, congrats on getting started with your real estate journey!