It is hard to suggest a furniture arrangement without knowing what furniture you have to arrange. if you are buying all new, a 3-seat sofa and two comfy upholstered chairs (can be swivels) are very good base pieces that are more flexible than a sectional. If you like the sectional look but want flexibility, consider a reversible chaise sofa where the chaise portion can be flipped from right to left as your various arrangements require. Have you gotten the name of and sourced the flooring that you want to install? It is a fact that many products are now in short supply or impossible to get. Check that box first and purchase what you need to do the job if you find it. Some changes to consider would be closing the useless pass-through to the living room. That will be a great wall for a good looking focal piece of casegoods since it appears there is really no foyer, but just a landing spot. Consider replacing that tile with the new flooring, if you have another mudroom style entry spot for family to remove messy shoes/boots and hang coats, etc. Except for the fact that the fridge is located so far outside the work triangle, and you have to schlep foods to be prepped all they way to the sink, it looks usable. Live with it for a year and see if you want to make big changes based on how it functions for you. With the pass-through gone, I would remove the cabinet and curved piece above the sink, and I would consider doing the same at the cooktop, installing a new hood in place of the cabinetry. Hopefully you can get more of the same tile to take to the ceiling behind the hood, or change it all out if you decide to do the cosmetic changes rather than a demo/reno. Please use a regular table in the dining area and update the chandelier there, add LEDs under the remaining upper cabinets. You might enjoy a small breakfast table with bench and a couple of chairs at the big kitchen window. We don't know how many are in your family, so better ideas will surface if you provide that information. As for the back yard, nice patio furniture and lots of big pots filled with bloomers plus a splashing water feature is what my daughter has and it is quite inviting and peaceful when the pool isn't full of teens!

First change all the lighting to LED 4000K so thay yellow hue does not skew every choice you make Are you sure you can get the same flooring ?Waht is your style ? Is the kitchen staying as is ? I need a lot more info and you need to post to scale floor plans of the space showing all windows doorways where those lead and all measurements clearly marked . You need aton more lighting in that kitchen . Are you getting new furniture or if not we need info as to what you have . Is there a FR and a LR or all one space . so many things we need to help you.