I would like to create some glass’/bowls with some liquids in them but i am not sure how to tackle the problem. I know how to animate fluids but am not sure how to create the liquids in a model

I think the best way to animate fluids and not mess with the fluid simulation is to use Meta Balls. If you get a good material on them and arrange them the right way you can come up with some good results. You might want to try it out. Hope it helps!