Woof.
No carry-ons, higher fees for seat selection, higher fees for checked bags, last on the plane and back of the plane. Neat little option they've put together here.
https://twitter.com/user/status/1797997358795329996
Would love to see an airline try out 'no carry-on but you can check a bag for free' option, but that's probably too much value for an 'ultrabasic' fare.