I've been shooting clay target sports since the mid '90s, and have bird hunted since I was old enough to not get kicked on my ass by a single shot 20ga Stevens. I have a couple of Beretta shotguns, both 390s and 680 series O/U.
My advice for someone just getting into the game of clay targets would be to find a used
390 or 391 Sporting model with a 28" or 30" flat rib (with screw chokes).
These guns have shims that are located where the stock meets the receiver and where the stock bolt tightens up against the stock.
They can be adjusted for cast on/cast off and comb height by changing the shims.
Beretta also makes 3 different recoil pad thicknesses to adjust length of pull.
It enables the gun to be adjusted to fit you by swapping inexpensive parts.
Properly maintained, you can not wear these guns out unless you shoot a LOT of targets.
Once you decide that, yeah, I'm hooked in this sport, then go looking for a dedicated target O/U shotgun.
Either gun can be easily picked up for less than a grand if you do a little looking around.
What ever gun you choose, make sure you go somewhere where you can try a number of guns to see what fits and feels good.
Talk to someone who know about shotgun fit. If it doesn't fit, it won't shoot where you point it.
If you were in Texas, I would recommend going to the National Shooting Complex in San Antonio during a major event.
Vender row will have multiple dealers and manufacturers with guns that can be demo'd.
Maybe you have something similar near you
Best of luck