Yep, don't worry about nutella, dairy free "nutella" exists too, and it's really good ! Dairy free yogurt too, most of the time it's soy yogurt.
About me, i'm a vegetarian since a little bit more than one year. I used to really enjoy the taste of the meat, but the more I though about it, the more I realised it was just... Weird to eat other living speicies. I mean, I won't eat my dogs, so, why should I eat others animals ? Today when I see meat I'm just thinking "omg this is a dead body piece, did I really ate that for years ?". But I think everybody can do whatever they want, almost everyone of my friends eat meat and I'm ok with this. I can't stand people like "you have to do that because I do have the truth ok"
I also try to not eat dairy products, eggs or others animal products. I know almost all of these products are produced involving animal suffering and I feel quite guilty about this. But it's quite difficult (at least, in france, idk about other countries) to be a vegan, so I keep on eating some of it sometimes. But when it's just for cooking, not for drink; almond / rice milk; soy / coconut cream etc are perfectly ok. But, let's be honest : it's quite expensive xD
But, oreos cookies doesn't contain milk. As long as we can eat oreos, everything is fine.
I think it's quite difficult at the beginning to change our food habits, but after few weeks we feel better !
*omg I wrote a lot, sorry*
Anyway, good luck for your dietary changes (: