I'm surprised no one has said it already so I will...
The best gun for Alex is the gun that fits Alex the best!
My suggestion is to hold and aim as many guns as you can while someone experienced looks at how the gun fits you. Many guns can be adjusted to at least some degree but if it can't be adjusted for you, then it's not what you want to be shooting.
I've helped many new shooters at our club and am surprised by how many that arrive with a gun that doesn't fit. I like to have new shooters close their eyes and shoulder the gun in its "natural position". I look down the rib at them when they open their eyes and if the rib doesn't line up with their eye they need to make adjustments to the gun. I once tried to help a lady who shot right handed but the gun naturally lined up with her left eye. That's an extreme case but it illustrates the range in the size and shape of both people and shotguns. I don't think there is a gun made that has enough adjustment to fit her.
I firmly believe that fit is the most important factor. Stock material, action style, price are all secondary considerations (well, price is pretty important too if it's more than you can afford

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Ian