Jordy vd Ven

Hi guys, i want to replace the halogen headlight bulbs on my e46 pre facelift coupe from 2002 with xenon ones. The only problem is that i have no clue how to choose what i need for it. Can i just buy H7 xenon bulbs and plug n play? Or do i need some sort of relay or converter in between? Any recommended sets? I was looking at GP Thunder xenon lights but i dont know if it fits my car though. Thanks for your help