I want to open up a wall?

i want to take a wall out in my home. Its a wall that seperates two rooms (of course), but i dont want too remove the whole wall just a space about as wide as double swing french doors. My question is ...........Is it hard to do? Do you just cut the drywall and find the studs and cut the studs and brace or do you call a contractor? I just want the page way to create a more spacey feel and look.