Sophia, Welcome to the Router Forums! Hopefully we can help you in your router and woodworking pursuits. There are many here who will chime-in, I would venture to guess. There are numerous things that affect the feasibility of your doing floor plan changes. You may wish to have drawings of the floor plan as-is, and then make a drawing of the floor plan as you wish it to be. Contact your local building inspector or an architect to verify that what you wish to do is feasible. There are several major potential hazards to doing this type of work without substantial knowledge. A few of the "big ones" that come to mind are load-bearing walls, electrical, plumbing and HVAC. Not all walls in a structure can be safely modified - if you have a roof - you have load bearing walls. Electrical items in a wall can cause need for professional help, as can plumbing and HVAC. Please contact a professional for your own safety - both physical and financial!
OPG3 Tweak everything!