Should I get a Polaroid camera?

Most people who get a Polaroid or some other kind of instant-film camera will eventually stop using it once the novelty wears off and they can no longer justify spending more than $1 per shot for film.

None have better image quality as the film's resolving power is quite low.

I suggest buying a used Polaroid Spectra since it was Polaroid's top-of-the-line camera back in the 80s~90s.  Film is still available for it.  It's got a real AF system as opposed to a fixed focus in most old & new Polaroids and Fujifilm Instax cameras.

I'd stay away from Fujifilm's Instax cameras as they seem to break a lot!  The only exception would be the 90 which costs a lot more than the toy mini8.  But still, going with a used Polaroid off of eBay will mean not having to spend a lot on a camera.  This is will be very important in a few months once you stop wanting to spend all that money of crappy instant-film photos.

Instant cameras? Those are toys.

I think that answers all your questions.

If you can get and afford the film, the SX-70 is superior.  Cameras are less than $100, and eight exposures color pack is just about $19- $23 on Amazon and Ebay.
The 600 model does not fold flat, but has many of same features.
You should be aware because of the nature of the emulsion and self-developing chemicals, the character of the images is "softer" (not as sharp as regular emulsion films).