Now this is an expensive thing to do, and might be of limited value, but worth a thought: I was advised to try hiring a boat for a week or two before making any big purchase.
I did that and I wasn't put off (much), but I would also consider hiring a boat in colder weather, to get a flavour of the issues involved in winter boat life- eg disposal of rubbish, getting the boat warm in the mornings, transporting coal/fuel, food, and other essentials from the various shops to the boat, along towpaths that are often a muddy, slippery morass, etc. There are a few challenges, but the boaters don't seem to mind much.
The canal world forum is a good place to raise specific queries, but I would add a note of caution- there is sometimes a tendency for people to be quite condescending, brusque, and often just downright rude to new members (and each other), so choose your words carefully if you are thin skinned.
The sniping and occasional hostililty on that forum does somewhat belie the impression of a warm and welcoming community that one is so often given in vlogs and conversations, and the behaviour there can sometimes be in stark contrast to the very helpful and positive general attitude seen on this forum- something which I think is to the great credit of this forum, and perhaps says something about the differences between motorhomers and boaters- or at those that have an online voice.