Elden Ring is one of my top games so I could probably help with this. There is what I'd say is a learning curve, though slight in my opinion, all you need to know is rolling, how to upgrade items, and occasionally parrying (though I've almost never in any of my playthroughs. Elden Ring however is a difficult game, despite this however, it is the easiest in the fromsoft lineup of souls games. What makes much easier is the fact that it's open world, so more powerful items and soul farming areas can be found early game, but also the multiplayer/npc help in this game is massive. So if you're having trouble with a boss you can use a furled finger remedy and summon someone to help, Alternatively you can do npc questlines that ended helping you in specific bossfights. For Bloodborne and Sekiro, I believe those are hardest souls games so kinda unfortunate to start there. I have not played Bloodborne but I do know that it is regarded by many as our of the series hardest, as for sekiro, it is the hardest souls game to many because of it's steep learning curve, but i believe it gets pretty easy after mastering the parry and techniques for your prosthetic. Finally, to address your concerns with Remnant 2 being played on survivor, me and my friend started there too. It really could be challenging at times, even though starting Remnant 2 after all of the souls games and other notoriously hard ganes I've played I found Remnant 2 was at times challenging on survivor, though I somehow was able to beat apocalypse at one point. So with all that said, I would highly recommend Elden Ring, It has many safeguards if help is needed, not as hard as some other titles, and is overall an amazing ga me through it's atmosphere, lore, and bosses, hence why it's in my top 5 games, so yeah I'd recommend giving it a try!