This modern world of richness - product choices, specialty, price points - is made for your problem. It's just like all the guitar choices now vs my days in college. I hope these other tips will help because cycling can be so fun and a good all ages activity.I come from a blood line of persons who are totally devoid of posterior padding. I was fine until I became an adult and then, lo and behold, my backside disappeared. I had comfortably ridden bikes for years, including English bikes and 10 speed bikes, but when I hit my thirties, suddenly every bike seat I tried felt like sitting on a knife - it was literally excruciating after a couple of blocks on level ground. After trying various saddles I eventually gave up. I have no idea what saddle shape shape and padding is needed to counter this.
There are many choices for shape, width and length. Some are better for an upright or very aerodynamic position on the bike. Shops have setups to measure the width of your sit bones but you can do it sitting on a few layers of corrugated cardboard too. A good bike shop will work with you like a good music shop and let you try stuff.
On shape, the Brooks @Stanford Guitar loves have a more rounded profile if the most popular WTB models are more flat. More and more the makers try to have both shapes.
Something else in this is like getting the fingers used to fretting the guitar. If you haven't been on a bike in a while something soft makes sense regardless of its physical design. When you have your base fitness a more padded seat will cause more trouble.
In some posts long ago I thought you mentioned diabetes or cardio matters. If you get your base comfort and fitness you'll have a fun way to help manage that. I just enjoy riding and the gear similar to music stuff but the keeping at the exercise has managed medical conditions better than drugs. Side effects are fun and sleeping sound thus my promoting it and being glad to help you get back riding.
P.S. On padding, liner shorts if not bike shorts make a difference. It's counterintuitive like the saddle padding where for really long rides or some scenarios the thicker pads are not the answer.
P.S.S. Trek's Bontrager brand is their saddles but anything Trek has a 30 day satisfaction guaranty and their shops whether company owned or independent are generally pretty good or downright great about that and warranty stuff.