Thanks for the welcome. This is our first home and neither of us are very experienced in lawn care. I meant to type in 1809 square feet, but even that is an estimate; I would have to go out tomorrow when it's light out to take the actual measurements.
The yard is somewhat beat up, a combination of the previous owner having 4 large dogs that lived outside (uneven ground, lots of dig holes everywhere some that are even fairly large) and fairly cold weather lately.
The lawn will be a light traffic area. I really just want a nice lawn to look at; I don't mind spending the time needed to make it thrive. So here are the things I am trying to do:
1) fill the large and uneven spots with soil or whatever I should use to grow lawn there
2) have lawn grow in those spots and rather large areas where a shed used to be and a large dog kennel. I included the picture of the grass because I don't know what kind it is and what the proper way would be to have it grow in the bare spots (sod, seeds, etc)
3) elminate weeds. The third picture is on one side of the house and is really the only play where it has completely taken over. There are only spots of weeds throughout the rest of the yard.
Any steps I should take would be great. I figured with the brief below-freezing temperatures we have been having that I should wait some to start, so I was trying to plan ahead. Thanks again.