Howdy Isolate.
Changing cases isn't hard. Just remember that what comes out of one case has to fit into the other!!
So make sure the new case will take your size/type of mobo, has the right number of bays for your drives, etc, etc. And if you get a new power supply with the new case, amke sure it's rated high enough for all your stuff.
If you're not sure on any of this, then ask here, as someone will know the answer.
I think Tom's Hardware had a video on case fitting out somewhere. I'll see if i can find it. It's pretty easy, just a matter of screwing it all together (with a few minor
gotchas).
Cheers
Mick