If this is your first airline job, you will find compound emergencies challenging. IE, you have three problems: a dead (burning) engine, loss of hydraulics from said fire, and loss of generator from that engine, and you have to thumb through wide areas of the manual to find the checklists you want.
You didn't say if this was for FO or FE. If FE, balancing fuel and keeping the electrics on line requires vigilance, and there are mneumonics such as "I-Trip" and "H-Trip" that will help you remember what to do. (So-named because of the pattern the Illuminated lights make).
FO? Old school round dials, and Math In Public. You will need to calculate your own descent gradients. There is an old 727 adage: "If you can see it over the nose, you can land it," meaning with all the drag out, it will make a very steep descent, but that's not the most efficient way to do it.
Be prepared to lose some of your hearing.
I wore ear plugs....you might have the money for a Noise Cancelling headset.
I thought it was more challenging than expected, engine-out, for yaw, but it was only my second airliner, I only flew the first one for 5 months....I was green in the airliner biz.
Landing: a mystery, just like women. One day you would grease it on and think "I have got this thing wired!!" The next day, you would register on the Richter scale, and you would pray the "rubber jungle" wasn't hanging in the back (thankfully, it never happened to me!)
Flew it for a year as FE and FO, and loved it. A classic of aviation.
Good luck.