The only basic requirement for using SRD 5.2 is to follow the Creative Commons attribution requirements, which are slightly simpler than the traditional requirements of the open-game license.

Therefore, for any text, figures, or other work in any medium you hold the copyright to, by submitting it, you agree to license it under the Creative Commons Attribution 4.0 License. As an author, you ...

Therefore, for any text, figures, or other work in any medium you hold the copyright to, by submitting it, you agree to license it under the Creative Commons Attribution NonCommercial, No Derivatives ...