There are lots of different phowa practices. Mostly they are Amitabha sadhanas. I received one from the Nyingma lineage and also there is one from Naropa’s lineage. Amitabha is the special deity that helps in the transfer of consciousness at the time of death. If you don’t have any doubt then there aren’t many obstacles to being reborn in Amitabha’s realm. But even if you are born there, you aren’t enlightened. But in Amitabha’s realm you can practice. Our realm sometimes has dharma teachings and sometimes does not. But in Amitabha’s realm the dharma teaching is continuous. There you don’t need to work, things come just by wishing.