Walls and Ceilings - How do I cut out part of my wall?

I would like to cut a hole in my wall that separates my dining room from my family room. Probably a half arch so you can see through. I'm pretty clueless when it comes to handy work, but would like to learn. Any pointers? Thanks so much!

You could treat the opening like you would a window. After you have determined if the wall is load-bearing or not, you'd remove drywall in a square large enough to work about 1 foot on either side of the final planned opening. If this opening is to be larger than the span of 2 interior wall studs (many times 24" on center), you will have to build a header to support the ceiling (and the second floor if applicable). Support the ceiling, cut studs, and build a suitable header, which leaves you with a square opening. Frame out the opening to the rough-in size. Then you need to build the arch...some do this with several layers of thin plywood, others do it carefully with thin drywall, and still others use pre-made adjustable metal arches you can find at the big-box store. After that, it's just finish work. Drywall, texture (maybe), paint, etc.

Also be aware of electrical circuits you may encounter and have to re-route, as well as plumbing and venting.

That's my "rough draft". I would hire someone to do this unless you have done framing before. And since this is a kitchen wall, assume there will be surprises (wires, vents, pipes, etc).

Good luck.

Thank you so much!