Not really. There's actually very little you have to give up completely. Specific brands are generally out of the equation, yes, but, like, you can still have chocolate in a lot of different, delicious forms. You can still make lasagne.
You don't have to do it 100% right away if that feels too intimidating. Start with singular days of skipping all meat & dairy or alternatively start looking for additions & alternatives that work for you little by little. Look for your favourite recipes and just start replacing/leaving out animal stuff. Plant based creams (soy, coconut, oat, rice etc.) instead of cow cream. Beans or some meat substitutes instead of meat. Plus figure out what animal based ingredients aren't really needed. Something like egg can be replaced quite easily or omitted from a lot of recipes altogether.
And remember that almost all food are very much acquired tastes and your taste (buds) are adaptable. You might not like something right away but keep tasting things (maybe in different contexts) and you'll probably notice starting to tolerate and even like a lot of stuff that you might not like at first. For example, I wasn't a huge fan of kidney & many other beans in the beginning. So I started by adding a smaller amount of them in some foods until I got used to them and now I don't mind any amount of them in any food.
Plant based milks do also have very distinct taste but just imagine if you had never drank cow milk before and tried it for the first time in your 20s or 30s. I'd imagine most people would find it disgusting. If you're serious about this, just occasionally try out different brands/types. And remember, plant milks can taste very different, even different soy milks have their differences depending on the manufacturer and/or ingredients. So even if you don't like one soy milk, you might like another brand's soy milk.
Cheese is a stumbling block for many. A lot of people can't stand vegan cheeses. A lot of people want that slice of cheese on their bread/toast or pizza. My suggestion is that if you don't find any vegan cheeses you'd like (even after several tries), start making your own spreads (it's super simple, you basically just need chickpeas/other peas or tofu, some oil, a little salt & seasonings of your choosing and them just smush it into a paste). You won't miss cheese on your bread as much if you have some delicious garlic-chickpea spread on it.
Things to look into:
-falafel
-seitan
-nutritional yeast
-kala namak (aka black salt)