Unfortunately there is no way to test Design Live as a trial version yet. We are in the process of making the trial version currently. Once the Design Live trial is available we will announce it so that anyone who is curious about it can use it! So please stay tuned for that information!
While Kris is correct that 2020 Design Live is not readily available in the free trial format, I can assist you with your request so you can have the opportunity to test-drive 2020 Design Live. We will reach out via email to coordinate this with you.