nothing is objectively better for you. it just depends on you. i prefer tactile clicks when i type. i have become accustomed to only pressing enough to click and then letting go. if that isnt you, then it really doesnt matter what you type on. a mushy membrane board might get the job done because you are used to it.
This. I would say buy 2 cheap mechanic keyboards on amazon: one with red switches (linear, quiet keys), and one with blue switches ("clicky" keys with tactile feedback). See which you prefer, and then return one or both to UPS store or Kohl's and then dive down that rabbit hole if you want to get something really quality.
As for my personal experience, I was perfectly fine using a regular ole membrane keyboard, but I was curious about mechanicals and got me a cheap $20 one to try out. Loved it, bought a better one, and now anything that isn't a mech with blue switches just feels weird to me.