I have a few shotguns in my collection, 15 in all 😁, all spring powered. Not had any issues with them.
Each type has their own strengths and weaknesses. Gas, less strength needed to pump, sound great when you rack, a little more power, but gas usage means you do have to be wary of your shots and do require (as any gas RiF) up keep to keep them in good working order.
Springers, a good arm work out and you’ll feel it the next day but no worries about worrying how much you have left in the tank and will just keep going.
As the previous commenter, I would also personally recommend the Cyma range of shotguns as build quality is good and always good fun. I have a number of their full metal ones and a couple of polymer builds for variety and love them. Obviously the polymer builds are also cheaper than the full metal one to. I also have a couple from the Double Eagle brand with there textured rubber grips and they have also never let me down and are good fun. The majority all have the tri shot barrels to as a shotgun should spread!
I’ve also got some S&T shotguns which are full metal with real wood which are beautiful to look at and hold but they are only single shot and can have a little more range if that’s what you are wanting.
My opinion with shotguns is that they are best for close quarters, room clearing etc and are not designed for reaching distance. So you have to adapt your gameplay for them which can be fun!
Buy I would definitely start with a springer, get the feel for it and if you enjoy it then look to upgrade down the line!