No JRE found - Android Studio

Greetings all,

My problem
I downloaded Studio for Linux as a ZIP file, then extracted and moved the contents into WSL. I also downloaded default-jdk which has given me v.11 of javac and openjdk. However, when I try to open Studio via sh command, I get this frustrating message:

No JRE found. Please make sure $STUDIO_JDK, $JDK_HOME, or $JAVA_HOME point to valid JRE installation.

My setup
Windows 11
Ubuntu on WSL2 version "22.04.5 LTS
Android Studio - Flamingo for Linux
openjdk version “11.0.19” 2023-04-18
javac 11.0.19

Failed solutions so far

Configured JAVA_HOME by inserted this export into .bashrc:
export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64/bin/java in /.bashrc

Any help much appreciated!