Welcome to the forum. I'll warn you, once you get started into this hobby its nearly impossible to stop, and you'll never look at another tree the same way again.
I'm not familiar with those wood species, or your area so I haven't got much to contribute there.
But in general you are ideally looking for about a six foot section of a tree with no branches or other defects. Watch how the bark runs up the tree, if it seems to spiral as it climbs up the trunk, the grain is twisted and maybe you should find another tree. You will never find the perfect tree, so just pick the best one you can find and go with it.
As far as harvesting, a saw or axe doesn't really matter. Just take care not to damage the tree too heavily during the process, especially if its a whitewood. With most whitewoods the first growth ring under the cambium will be the back of your bow, so you need to treat them with extra care.
Debark it, split it and seal the ends and back with a sealer of your choice. I use shellac because I always have it on hand and its easy to sand off later. Some people use glue or paint. Anything to keep the back and the ends from losing moisture too quickly and cracking.
Let the debarked and sealed staves dry in a relatively dry spot, out of the weather, and away from bugs. A garage is a good place, or a shed. Its good to let it dry for a year in most places but you can get away with less if you rough it out to near net shape early and monitor its weight loss. When it stops losing weight, its dry, and you can start the real fun.
As far as tools go, there are just a few that I consider essential. A hatchet, a drawknife, a rasp and a scraper. You can make do with much less, but I use all four of those things a lot. I use a stanley surform rasp and I highly recommend it. For a scraper you could just use a knife, but I really like my cabinet scrapers and I also highly recommend them.