Seconding what everyone else has said already...

but also posting a few reasons to join your local beekeepers' assoc before you go any further.
A chance to
look before you leap: Now is a good time to see how busy things can get for beekeepers (swarm management, queen rearing, honey harvesting -- fingers crossed! -- and pest and disease control).
Somewhere to get
courses, mentoring, advice, assistance...
Insurance (for public liability and in case your bees/hives have to be destroyed because of disease are just two reasons for that)
Club-owned equipment (I'm thinking here particularly of honey extractors which cost hundreds of pounds -- a lot of cash unless you have quite a number of hives)
Places to sell honey (local county days etc -- with our BKA the cost of the stall gets split between the sellers pro rata according to each ones sales).
Plus, many associations will help their beginners out by donating swarms to them (sometimes a bit of a double-edged sword as you give your beginners bees that may just be swarmy by nature), or else breed starter colonies for beginners to buy at reduced rates.
Re
selling honey: don't go into this to make money! You can make a little (a hobby that pays for itself plus a bit) but unless you get quite large scale or start breeding queens for sale or stuff like that it's not a thing that's easy to make a living at.
You also asked about:
regulations -- a beginners' beekeeping course will cover the essentials. (eg hygiene, weights & measures, labelling.)
and
time commitments -- from spring till autumn, each colony needs inspecting regularly. Textbook = at least every nine days (weekly is most people's solution)... Can be quite lengthy until you get practised, as you need to check each frame. Plus time spent making up hives, frames (for the bees to build comb on), harvesting and preparing honey (and cleaning up afterwards!), cleaning and filtering wax, plus making general running repairs.
Traditionally, beekeepers had a quiet life between November and February but even then you need to pop down and check that hives haven't been disturbed/damaged.
Please don't take the above as discouragement.... bees are fascinating and wonderful and I wish I had time to spend more time with them than I do!