You have a lot of rusty metal that needs to be replaced.
Pans to keep it in the family and be used pretty much dictate the repairs, plus you live on the east coast with Snow!
Watch the videos suggested and many more if you really are willing to do the work.
I was going to say - and able- but most of us were not totally (or even slightly) able at the start of our projects! Some money for needed parts and perseverance is what IS required. Maybe also an understanding/ supportive ? wife if applicable.
Others will surely disagree but I personally recommend getting a mig welder that uses gas and solid wire not flux coated wire without the gas . No need for anything bigger than a 140 A with a small rental bottle for the co2/argon mix ( cheaper than the 100% argon) .
Much easier to learn to weld and will always give a much nicer finished product! Again, My opinion!
I totally agree with the need to weld clean / shiny metal parts for lasting - good looking work. Again many many U-tube videos are available on the how to's.
Car totally appears worth the trouble to do the needed repairs, I have seen others on this forum do MUCH more extensive rust panel replacement as beginners.
I have done my share of floor/ rockers/ body mount supports on two Plymouths myself, but I was not a total rookie to mig welding nor expert either.
Good luck!
DJ