1974 Dart Swinger VS. The Evils Of Rust!

Any advices or tips on how properly doing this? I have no welding experience! Costly to send to a shop? My front right floor pan is badly rusted. I also found my brodcast sheet, was under the carpet but sheet in very bad condition.

Over the weekend we started replacing the floor pans with new metal from rock auto and got the driver side front pan almost finished. I don't have a lot of experience welding so I am getting a lot of help from my Dad, this car will give me plenty of practice to develop my welding skills. Here are some pics from this weekend:
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