The order I played in is kinda goofy. But I started with Persona 5 on Ps4 and got past the first dungeon before my ps4 died.
I gave up on Persona 5 but when smt iii came to the switch I thought I’d give it a try and I fell in love with it. Became a huge smt fan with my favorite probably being IV or then first Devil survivor. Currently playing P4G on my Vita.
After years of my friend info-dumping about anything and everything SMT, I bought SMT V on launch day in 2021 and fell in love. Now I’m playing the original SMT and plan to go in order from there. As for Persona, I’m somewhat familiar with Persona 3 & 4 because they were impossible to avoid online during their heydays, and I’ve since watched my boyfriend play through Persona 5 and Persona 5 Royal.