The Beretta the store staffer recommended is the stock answer in most circles to the what gun do i start with question. That gun and the other comparative models from Browning miroku etc are unquestionably a good choice well tried and tested and accepted the world over.
The only reservation i have on recommending one of the same guns to you is the fact you are new to the sport/ discipline.
Just throwing a sporter at you over the counter you shell out the hard earned you walk out the door and live happily ever after.
Well this could be the case but it could also be the start of an expensive frustrating learning curve. Many scinarios could occur , you may fall out with sporting decide you want a dedicated skeet or trap model because you like this disapline or that. Or decide you like a X Gun X Model better than your original choice after a relatively short honeymoon.
The old WED in haste repent at leisure adage springs to mind here.
Your relative newness to the sport and not necessarily have you decided exactly what you want and need from the sport, i would eire on the side of caution here and think long and hard on your purchase.
The offer to try the guns is a good one but fraught with compromises, many in number to list here in entirety. They could vary from your shooting/gun handling style fit issues its virtually endless, and because you have no hard and fast rules set in your mind what you want or need to be effective at this sport is a big negative all by itself.
So where does that leave you, well i can only comment on the route i would take or advise friends or family to do in your scenario.
I would go along to the local trap club, get to see a few guns and chat with a few people most will be only to willing to offer advice, you will get to handle a few different guns, and who knows even get to shoot a few. Within a couple of visits you will have an idea what gun you want. It could be you buy the silver pigeon after all or perhaps a citori or cynergy, but it could be just as possible you decide that ancient 3200 remington was the gun for you and your search will begin for your holy grail.
If this all seems to be a long old dusty road to you and you want a start NOW!
Then this blokes advice to you is to perhaps start with a good used older model a Miroku 3000 perhaps reasonably priced and competent, or perhaps a Winchester 5000 or even a used Beretta but whatever you chose buy wisely if its in good order when you get it a used model wont loose you anywhere the money a new gun will the second you buy it, let somebody else loose the buyers slice not you. You will be able in most cases able to get your money back on a good used gun, or near to it. A new gun ..NEVER!.
Now once you have fuly got to grips with what you want to do in the sport, then fine go out and buy a new gun of your make model and style, but right now.. Tread softly thats my advice.