I first read Atlassian and could potentially get on board (they have made tons of QoL changes, which I love and actually like. Their API still isn't that great, though). And same with AWS. At first it's confusing for sure. A lot of their offerings are wrappers around OSS that is much more intuitive. But comparatively to Azure and GCF, they're all confusing at first.
But then I read git, Docker, and Linux. Now I'm concerned about your approach to any of these tools.
For example Linux. There is _a lot_ of documentation out there. Man pages and arch Linux wiki just to name two that have a massive knowledge base.
Git. I mean holy smokes, I'm going to assume you've never used any other VCS because everything else before it was hell on earth (in my opinion, people have things to say about this). I would focus on learning some git commands and I think you'll really like it. Going straight into a GUI you might be confused when you have to fix a problem via CLI when GUI messes it up.
Docker - yeah, I see your point. It's not as apparent when you're trying to pull different architecture images. Kind of a shame. Maybe Rust WASM/WASI will replace it one day (kind of joking here).