The Killer WiFi hardware found in many current Dell laptops is supported from Kernel 5.2 upwards but your newest release has 5.0.
When I installed LinuxMint I got around this by connecting to my iPhone via bluetooth and using the mobile broadband to download the latest Kernal and then everything works.
I can connect my phone via bluetooth to Hera but the mobile broadband does not appear in Networks as an option. Is it even possible for the user to update the kernel in Hera? and is there a way around the bluetooth wifi connection. I would really like to try out elementary OS properly. Paul