For me, thought, setting up a system is not the primary pain point today. FWIW, signing up for a cloud service is not hard.
The problem starts at the ingestion point. I am writing my apps according to 12 factors and running them in docker containers. What I want is an agent companion that will collect logs and metrics from these apps and containers and forward to the system. Datadog and Grafana has that, do OpenObserve?
Also, interesting that in your quickstart tutorial you have a step of unzipping logs file before sending to the system. I would suggest the ability to send them in (g)zipped format, as it is an organic format of keeping logs.