These aren't like Episodes these days. What we call 'The Daleks' is really "The Dead Planet", "The Survivors", "The Escape", "The Ambush", "The Expedition", "The Ordeal" and "The Rescue". It is all one story. You'd struggle to watch one by itself as it would make little sense without the surrounding parts.
Like Volpone says, they realise this themselves towards the end of the First Doctor's run (and the writers probably got annoyed a lot of good names were already gone) and switch to Part 1, Part 2 etc, but they make episodes in the exact same way.
Well
that's confusing. Why couldn't they have had just episode titles? What was the purpose of spliting them into serials?
You're just too young to be familiar with serialized stories (I am too, for that matter). But this was commonplace back in the day; Britain just held on to the format longer than we did. But radio shows and cliffhangers in the cinema (like Flash Gordon) would always end with "Will our hero survive certain death?!?! Tune in next week..." However, recently there seems to be a swing back to this kind of format. Game of thrones, Orange is the New Black, Gotham, House of Cards - basically anything designed to "binge watch". (Later seasons of DS9 were probably among the first to get back to serialized TV).
Most people don't really refer to pre-War Games stories by their individual episode titles (The exception being "An Unearthly Child"/"100,000 BC", for reasons which I've already stated) - They all are considered one big, self-contained serial. But also as stated, you certainly cannot just pick random episodes within a serial, that will leave you more confused than skipping episodes in NuWHo.
For most under 40ish, watching classic Who takes a little patience and getting used to. It wasn't designed for today's short attention spans and instant gratification. On, the other hand, watching an entire serial straight through can have its own set of problems (especially if they are over 4 episodes long, which is most of Pertwee's era). Doctor Who was never meant to be seen this way.
I watched a video which gave a tip that might help. Pick a story, watch an episode, absorb it, then leave it be. If you want to move on to a new story or Doctor that day, that's fine, but the idea is to leave you hanging and wanting more. Return to your story the next day and watch another episode. I took this advice and found it works well (especially with older Doctors with more "talky" adventures).
(of course, there are some really good stories you'll WANT to watch from beginning to end....that's ok too.)