Singles Pickleball is very fun, quite demanding on footwork and is something everyone should try at least a few times. I find Pickleball much less stressful than Tennis. The major difference between Pickleball and Tennis for my level and for recreational level in general is that one can get into playing Singles Picklebal Matches almost right away, since the serve is super easy to start the games and the learning curve is just much faster than tennis which, in turn, makes Pickleball much more accessible to much more people on an instant.
The most difficult part of Pickleball for me is to find people to play. They just don't know about it and there are not Pickleball courts. I set-up my court with a portable pickleball net I got in the acrylic yard of a nearby Primary School yard. So, I actually have a Pickleball court available for me anytime I want, but very few people (yet interested) to play.
Padel is a but more demanding and one should have some short of athletisism in order to play a match, mostly to keep themselves out of a possible injury from the heavier pader racket, contact with the glass and contact with the side fences.
I've never played Doubles-Tennis, but I much more enjoy playing Padel with some of my tennis hitting partners and other friends that don't play tennis, but can hit the beach tennis ball with the wooden rackets.