Welcome from the other side of the prairies. Now that the snow is gone (hopefully) we can get back to work. A mig welder is a great investment. I would be lost without mine. You will find tons to do with it on the truck. I picked up some thin gauge sheet metal at Princess Auto. Use snips to cut it to the approximate size and shape of the hole. Hold it from the back, gently mig it up from the front. Whent the front is repaired go to the back and weld up any loose edges etc. The joy of migging is that you can grind down and build up really easily. One problem with a MIG is that it doesn't like rust, or grease, or old pait, or working in the wind. For body work it is great. Have a fun spring.
David