Voice effects

Hi guys!

I’m trying to record a vocal cover with a friend. The problem is that I don’t know how to get some effects.
The song is this one:

http://www.youtube.com/watch?v=rFaHO6Hihmw

1ºHow can I get that that effect on the melodic voice?
2º Could you give me any advice on how to edit the screaming voice so it sounds better?

Thanks!!!

https://forum.audacityteam.org/t/talking-to-singing/23114/1