Yes, a 2x6 should hold a porch swing and safely support the load. A smaller joist runs the risk of it not offering enough support for the swing. If you have a joist smaller than 2x6, add additional bolstering support.

You may need a permit to install your window seat. Even though it's an indoor modification, some municipalities require permits for any built-ins added to homes. Check with your carpenter or, if you're DIY-ing, do some research on your city's requirements.

Modern brick houses are really stick-built homes with a brick facade for aesthetic purposes only, so most have framing. With genuine brick construction, most homeowners install furring strips over the interior of the brick and then install drywall over those strips to cover the brick wall, so they don’t have traditional framing.

While framing a basement is not as difficult as finishing a basement, it's something you should typically leave to the pros. That’s because if something is installed correctly, it will affect your entire basement. However, you can take care of some of the smaller tasks, like filling holes or putting up some insulation.