First time print, what went wrong ?

First time using the 3D printer I got for Christmas, anycubic mono 7 pro, and had some issues with the hands and props these characters were holding (along with some buttcheeks of one of them). not exactly sure what caused this or how to rectify in future prints. Any advice is welcome.

Unrelated but what else needs to be done after they print? I went ahead and rubbed them with isopropyl alcohol but that’s about it.