I have played through Dark Souls once, and I am on the second playthrough. Yes, it is a difficult game, but it is very rewarding because of it.
Also, if you have other folks, helping you out and playing through it along with you, it can make it easier on you. If Dark Souls is chosen as the game, I will help anyone with getting through it. I have lots of great tips, and I know how to put the advantage back on you. I wouldn't say I am the best at this game, but I did learn a lot from playing through it. I hope to pass that on.
This is to say it will require hard work, and determination. Believe me, there is no feeling like when you get through this game, when I finished I felt like I had just got finished having the roughest sex of my life, but it was all worth it.
if it doesn't get chosen and you want to play it let me know, and I can play it with you.