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Beginner tutorials exist. Have you even tried looking? Linux has better documentation than anything I’ve seen in any other OS. Man pages, help files, and commented configuration files galore in just about every single Linux distro without any Internet needed, but it sounds like you never even bothered to look for them.
Sure, assholes online exist in Linux communities, but they are EVERYWHERE. We’ve got a couple right right here. That doesn’t exactly distinguish FOSS communities from any other.
Generalizations about all of FOSS based on your limited experience with a few distros is just asinine. FOSS is way more than an operating system.
Expecting a machine to hold your hand through your learning is such a weird form of entitlement and an especially weird distinction to make since no other operating system does that to the level you expect either.
Corporations pay for support services. The code is free (as in speech). No one ever claimed that the support was also (or even should be) free. Microsoft support is a joke. Apple support is mostly just a sales scheme. Linux support forums might be hostile to entitled noobs looking for a handout and a quick fix, but they are fucking heros when given a chance to help those who put in the effort to help themselves.
Ask a lawyer for an informed opinion. They’ll (hopefully) have the tools to determine what this easement means for you as a potential homeowner on the parcel. The Maine Geological Survey has an item in their FAQ of some relevance.
I don’t know how common these kinds of easements are in Maine, but I would not purchase any real property that could be used and abused at the whim of a corporation with a team of well paid lawyers.