Just curious, is your shed heated?I thought about doing something with my shed to make a proper work area for these endeavors but kinda nixed the idea for now.I found not having stable temps played heck on wood as well as metal rusting prematurely. I'm sure someone with a similar work area will chime in.
Joe is right, the wood needs to be kept, not warm, but in a fairly stable environment. Repeated changes in temperature and humidity play the devil with it, and your tools. In my area both the temp and humidity have been all over the map this winter and I've temporarily given up working in my unheated shop. Last winter it was the prolonged cold that interfered with working there. Yeah, heat it, and you too tddeangelo...
You will need a set or full-sized flat chisels, or at least several in sizes 1/16th, 1/8th, 1/4 and a half-inch. If you are going from a blank then a band saw is nice, although you can use a hand saw. You will need to know how to sharpen those chisels, any hand tool needing sharpening. Full-sized chisels and my sharpening stuff... you can fabricate the stroping blocks from scrap lumber and leather, use chrome oxide on the leather, rough side up. I use DMT diamond stones for shaping and sharpening.
Various rasps, my collection shows both the useful and not so useful bought over time. The Japanese Iwasaki rasps are super useful (from the right #'s3,4,5,6,7 plus a larger one in the middle)...
Various files are also shown in the above photo. You can't go wrong with Gobet brand swiss files in #2,3,4 cuts, they are not inexpensive but with proper care will last a long time. Of course at ACE hardware you can find the Nicholson brand files too, the brazilian made one's are no good, the files made in their mexican plant are passable but not great. On the left in the photo is a 12" Nicholson Mill Bastard file I use for draw filing barrels. You will need some wet/dry emery paper for metal finishing, back it.
Measuring stuff, squares and such, you'll need some...
Tapping tools, and the proper sized drill bits, the 8/32nd's will see you through.
Enough for now, your tool collection with grow as you encounter the need. Buy the best you can afford, except for the flat chisels, with those some of the less expensive sets are fine, such as the Narex brand. On the other hand if you really want to spend some money buy the expensive stuff. Paul Sellers YouTube video series has some good ones on sharpening tools.
Have all the fun you can.
dave