Hello Adrian,
If still time: don’t, and stay on Mojave as long as you can.
Catalina can be a major source of problems with all the securities they have added in MacOS. It is OK if you use only Apple software, can be pain in the … when using third party. Maybe VERY recent third party software is full compliant. But I have got messages for some installed apps when upgrading to 10.15.5 recently.
Regards,
Eric