I really dislike gel seats.
The thing is that while your sit bones might not like it, they can take your weight.
When you get a soft seat, the sit bones sink in, causing pressure on the soft tissue inbetween.
Compare to walking barefoot in sand. It's nice at the start, but after awhile your arches will be getting tender.
Apart from that it's pretty much impossible to guess from a distance. Even if you have the perfect saddle for you, expect an adjustment period if you are a rookie rider. The area that is effectively carrying your weight is quite small, and need some time to adapt to the task. Keep your first rides short.
Another thing is leg strength and endurance. Fitter riders rarely have their whole weight in the saddle, as every push on the pedals is basically acting as a secondary support. As a rookie rider, you will spend more time sitting more heavily.
And there's expectation management too.
Personally I've never found an actually comfortable saddle.
You'll never hear me say "hey this couch is really uncomfortable, I wish I had my bike to sit on instead". So what I look for in a saddle is possibly "comfortable by comparison", or "I can take this".
But sure, you may have gotten a saddle that's just wrong for you - that does happen.
If you find a good shop they'll try to measure the width of your sit bones, and then offer you a loaner saddle based on that.
If you're happy, you pay for it and keep it, or you go on to their next suggestion.