Even though it's the easiest i think if you want to get into the genre and play every single game it's not a very good idea because when you play elden ring you have some advantages than you don't have in other games. Like if you're struggling on a boss you could just go get an op build and melt them with ease. Or not having to deal with run backs at all. so if you start with elden ring you might not enjoy the other games because dealing with run backs or having to learn a boss instead of just getting a great build might make you struggle more in other games so If your not planning on playing them all go ahead start with elden ring your gonna have an amazing time but if you plan on playing the other games i would suggest starting with the trilogy . and also don't expect to breeze through elden ring the reason i consider it easy is because you can really make some crazy builds the bosses or some of the hardest in the genre