If I'm to consider your gaming "experience"... Stay away from Dark Souls, or pick it up for a very low price, if only to taste the whole thing.
Dark Souls, however, is not as hard as everyone says. Or it is, depends on your point of view. Actually it boils down to: it does not forgive the player, but when you die it's almost certainly your fault; you either tried to fight something you shouldn't yet, or you went somewhere unprepared, you might also have underestimated a threat (even low level enemies remain menacing if you don't get the "hang of it"), either way, this game punishes you fairly, you will never die because the game messed up. Plus, you're always learning from your mistakes.
In most other games you learn nothing from dying, you get shot in Battlefield you just try it and try it again until you shoot the enemy first or something, and I'm not talking BF down here, it's just that it's one of those games where your death comes with no advantages, sometimes it's not even your fault, the game is simply being unfair by say, sticking you with an infinite spawn of enemies while just saving your checkpoint in a moment you were short on ammo, making progress frustrating.
Dark Souls punishes the player and does so fiercely, but the gambit here is that you'll hardly leave a point where you died and not learn something new... I'm on my second gameplay, same character, and as many have said before, it takes a while for difficulty to show the second time around, so I sorta got used to easy killing the enemies again, I'm at the Depths and there's this place with two "Casters" (they're sorta like mages) and a bunch of rats, well, I decided to rush on them, seeing how strong I am... I got attack from so many sides that it was simply humiliating. But you see, it was ME, I underestimated the situation and was punished for it. Now, I dunno if you know the death mechanics here, but when you die you lose all your souls and any humanity already on the counter (and if in human form you get back to hollow form), you don't lose it for good though, the game goats you into going again at the spot where you died, if you get there and touch your bloodstain you regain everything. That makes you think: is it worth trying that part again? How can I go at it differently?
The only infuriating thing about Dark Souls are the invasions of other players. But... I must admit it has its own charm... Every time you're in human form (advantage being you can summon other players to help you) you become a potential victim of Black Phantom invasion, the ones that are NPC are usually very easy to defeat, but the players themselves? That's PvP in it's cruelest form. Still, that's part of the game, it's a risk you take because you just made things easier by being able to "call for help", also the invader is considered a sinner, the game allows it by being part of the gameplay but also makes it possible for the victim to "punish" the invader by means of the "Letter of Indictment", you use them to send that player to a sort of "black list" if one has enough of those complaints it seems some sort of punishment befalls them (unless they honorably left a sign for you to summon them for battle, in this case, since you allowed them in, you can't indict them, because it was sorta like a duel), there are other mechanics in game that even I, having finished the game once, am only now beginning to grasp, such as "disasters" (yep, "Disasters are gone with the Gravelord Servant vanquished) and stuff.
One thing is for sure, it has it's learning curve, it's honest in terms of difficulty, it will require patience no matter how good you are and it usually doesn't allow gamers who wants to "rush into battle" (maybe after your 7th gameplay when it stops getting harder), but if get through the first moments of pain this game will certainly addict you.
It's so cheap in most places now though that I recommend you buy it anyway for a taste, even if you don't plan on finishing it, if you enjoy it then you can buy and dedicate yourself for the second one, as far as I know you won't need to play one to understand the other. Oh, as far as story goes, the main story is very weak, but fable-like in an almost charming way, the lore, however is immense and very interesting and it's where the bigger scope of story is (including the true plot some say...). It somehow reminds me of Attack on Titan hahaha