Thank you for your reply.
After hours of digging, I am hesitantly about to try Plane by Makeplane, it's the only one I've found that explicitly advertise itself as a project manager AND wiki, while not looking as entrepreneurial as OpenProject, at first Glance.
As for Obsidian, it fails at being accessible remotely (without extra tools) by nature of being a desktop app, not good when all you have access to is a public computer.
A part of me thinks that maybe I am overreaching and should settle to a simple spreadsheet + wiki system for basic project management.
I remain open for suggestions.
That’s a valid concern for public computers. If you need that hybrid accessibility without losing the 'local-first' spirit, check out Syncthing or Tailscale. They let you access your home machine's Obsidian vault as a network drive securely. It’s a bit more setup, but it beats the 'entrepreneurial' bloat of SaaS tools that might not exist in two years. Sometimes a simple spreadsheet is the best answer, but for long-term knowledge, sticking to plain files is a gift to your future self.
Thanks for the tip. I see myself doing that for my own devices, but public libraries have strict restrictions on their systems, so local stuff is no go, I need a browser frontend.
I've concluded that top recommendations for a "lighter" project management software (with document support) would be something like Plane, AppFlowy, Huly, or Leantime. If neither of those satisfy me, I'll fall back to spreadsheet + Silverbullet.