tis boring..........I am badly allergic to milk so am dairy-free all the time.
it is hard work to start with I will admit, but once you are used to it, it gets easier to adapt thing and find foods etc
soya milk is ok, if you like that sort of thing. I don;t, so I have black coffee and dry cereal.
as for food, it is hard finding things that are milk-free and not expensive, but once you have found the varying things, shopping gets easier again
the allergy ranges in shops tho can be poor choice, especially as they are mainly gluten-free, they do still often contain milk. not all, I hasten to add, but lots.
cheese..........the soya version is nasty (IMO), but you might like it. health food shops stock it.
milk - all shops now sell soya milk. many also have the rice milk or oat milk versions.
chocolate........buy decent plain choc. the dairy-free sort is expensive and not that great TBH
ice-cream....swedish glace is lovely, and you would not know the difference. most supermarkets sell it. take care with sorbets......I found a lovely one in tesco (fruity), and they stuck milk in it!
biscuits........don;t go for the allergy ones. look on normal packs.....far cheaper tesco bourbones (sp?) are milk-free for eg!
ketchup and salad cream......you need heinz for both as lots of the own brands have milk.
erm.....will be back with more info if needed