any entry-level camera after 2012 is plenty good na. you can start with secondhand cameras as long as good pa yung mga battery. to be safe pag secondhand, bili ka nung no more than 5 years old para makakakuha ka pa ng aftermarket batteries.
ang malaking effect sa immediate quality ng pictures ay LENSES. nope hindi MP count, super fast continuous shooting, etc.
yung AF speed makakaaffect kung may speed requirement yun kukunan mo if like wildlife, sports, etc. pero general purpose or still life, kahit 2019-era camera pa yan plenty good na