Pronouncing Ø and Å might be a little bit tricky if you don't have this sound in your mother tongue, therefore I've made a little video about it. If you already know how to pronounce U and O, then it should be really quick to learn. If you're still having problems with those two sounds, you might want to go here and learn it properly first before you come back and try to figure out Ø and Å.
Lykke til! Good luck!
And don't hesitate to tell me how it went :)