I bought a pair when I first started for like $260 and I've used them 5 times in about 5 years
Get you a good pair of hip boots and a good pair of knee boots.
I use Max4 camo on just about everything I own for duck hunting. (blind bag, jacket, waders, gun, hat, gloves, etc)
Your gear depends on where you will be hunting. Hunting in a blind...don't buy waders.
Benelli is a good gun. I have a nova pump that I use as a backup and a SBE2 for my go-to.