If you’re new to handguns, a DA/SA gun like the SIG or Beretta are great choices. They both have external safeties/decocker and you can start with a DA pull. More a peace of mind thing if you’re new and unfamiliar.
However, in stock form, the DA pulls of both guns are heavy and require you to learn how to transition between a DA to a SA pull. Spring and trigger kits are available for both to lighten the pull but this will add some cost down the road. There are many fine shooters who can transition easily so it can be done. It’s not a deal breaker, just a FYI.
Both guns also have external safeties/decocker, which I hate. But, again, many people find comfort in them. Not an issue if you train to use them properly. Just not my thing.
I’m a fan of the polymer striker guns. I like the simplicity and the one trigger pull. If you choose polymer, I would go with the PPQ. They have the best stock trigger of all the common striker guns out there. And the balance is nice.
Personally, I’m a Glock fan but I know they’re not everyone’s cup of tea. The trigger, even the Gen 5s, and the grip angle are usually the complaints. Again, nothing familiarization and training can’t overcome.