User interfaces have come a long way in the past 30 years. Not just because graphics and touchscreens have improved — we also know a lot more about how to make a system feel intuitive. Just check out some videos that show how the most popular sites and apps would've looked decades ago.
There actually are Twitter clients for the Commodore 64 & Sinclair Spectrum & if they can manage that then I don't see why they couldn't manage versions of Wikipedia or Google with a basic browser, plus maybe some of the others with a custom program.
(There'd probably be quite a lot of disk swapping though & video would be out of the question unless you were a bit of a masochist... )