Nova

Hey everyone, I recently bought my first car, a 1989 Holden Nova. It's done me well the past month or two but recently I've got the modification bug. From what I've gathered on here, the 4AGE seems to be a good engine to drop in. Having no experience in any of this area, but always being interested, I'm curious to know what it would cost me/how hard it would be. Sorry in advance if this is in the wrong spot or anything. Thanks.