YuNoHost is a great alternative, but if you really want to learn, I would instead recommend really spending some time learning Docker; you don’t have to understand how to build your own images (although that is also very useful), but mostly what is going on at a high level, and then switch to Docker Compose. These days it is extremely easy to run very complex architectures with a single compose file.

You also don’t need to make it public for your tests, you can always start with local ip addresses and you own computer, or if you have a small computer that can run headless, then you can setup your experiments in there.