*nods* *waves* from lactose intolerance corner... milk protein allergies are quite different especially with breastfeeding and mother to child transmission issues. I know a few women who have had to give up all dairy while breastfeeding for this reason - with great improvement in child health once it settles and I think some of the children grow out of the issue later in life.
Soyamilk *IS* revolting! There are different brands and sweetened and unsweetened though so do try a few. Alpro is a good brand, but sometimes cheaper ones are better. It is not good in coffee cos it's acidic and you get curdling... It is OK to cook with...
Oatmilk is the least disgusterous of the cowmilk alternatives that I have tried... It wasn't terrible in tea if you get the right brand - it is worth trying a few different brands and don't try and make it yourself... I can't remember the one I found least bad if it was Alpro or something else.
I have tried soya milk of various kinds and I appeared to develop some kind of reaction to it about 4 months after the lactose intolerance - it makes me RETCH. I can however eat soya products and soya in things, so feck knows what that's about. It's annoying cos people buy me soya milk trying to be kind and helpful and I have to explain "sorry, worse than lactose containing cow milk for me".
Coconut milk is claggy and tastes sickeningly sweet and you need loads in tea - blech. It's OK to cook with for a sauce or something.
Almond milk is like a cross between soya and coconut milk, it's OK for cooking but not nice in tea. It's merely tolerable. A friend prefers it for things like hot chocolate.
Ricemilk is just sweet white watery substance and I don't see the point, you need about 200ml to make tea taste sweet and weird. Pointless don't bother.
I haven't tried any of the nutmilks like hazelnut cos they're not easily obtainable here but I hear good things but from people who think vegan food is nice so not to be trusted
.
I have found I can drink black tea which I didn't used to be able to. I should probably see if I can cultivate that cos I can't drink coffee at all, nevermind black cos it gives me hideous acid reflux.
Some of the Alpro soya products are pretty good, the chocolate desserts are genuinely nice, not cheap but very tasty and don't need refrigerating. I detest yoghurt but again there's soya yoghurts both flavoured and unflavoured which may be OK.
Vegan cheese is an abomination but there is a thing called Garry or something which all the vegans went nuts for. I haven't tasted it, but I'm sure it's foul but if you don't consider it cheese it might be edible. Other tricks can include using mustard and other things to make sauces instead of creamy stuff - as ever with this stuff it's trial and error. Find some vegan blogs or twitter feeds, copy the good ideas, ditch the bad ones and some people have had their taste buds removed.