In general, if you encounter text looking blue like the FP Open OS bit in the wiki, these are links you can follow to get to know more.
Additionally in this forum you might encounter something like #community:angels , these are links you can follow, too.
Most Android tutorials on the internet will assume you use Android with all the Google services and Apps, because this is a halfway standardized experience (even if smartphone vendors like to mess with the user interface).
If you want to have Android without Google services and Apps, you will not get far without a bit of effort 
.
With that in mind …
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Are you comfortable with English, or would you prefer discussing in another language, we are a pretty multinational bunch here.
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Do you happen to have #community:angels in your vicinity? They could help you face-to-face, perhaps this could make things much easier for you than discussing text.
Sorry, I seem to have worded that wrong.
Of course there’s a contacts App in Fairphone Open OS (without Google), I just don’t know whether it’s the same App as in Fairphone OS (with Google), so I don’t know whether contacts imported before an OS switch would be kept.