If all you want is to experiment without cluttering you local system, then the nix package manager is probably a better idea that self-hosting a web based IDE. It can be installed on any Linux (or Mac) and once installed works without extra privileges. As nix
isolates all dependencies by design, it can be used to create pristine, project specific dev environments without impacting or relying on the rest of the system.
There are plenty of blog posts out there explaining the concepts and how to get started, eg. https://monospacedmonologues.com/2022/06/throwaway-development-environments-with-nix/