Steve, you sound as if your starting from a small grouping of tools and a really rough piece of wood. I don't know how big this piece is, so tool choices are many. My earlier point was there is more than one way to get at this without going and spending hundreds of dollars, unless that's what you want to do. Hand tools just like with power tools, you can get lost in the choices and the thinking that I have to have this to do that or I have to have the very best or nothing at all. It's a very deep rabbit hole. There have been hundreds of books written on the subject and fortunately or unfortunately I have read most. that in no way makes me an expert, nor did it stop me from making mistakes along the way.
so with all that stated, any advice I give you is going to be subject to harsh criticism. I don't care I'm a maker, and I make everyday. I'm used to it. Fred made really nice offer to help you process your piece and if you want drive across state, that is a option. For that matter come to High Point and I'll process it with you. There really isn't one answer fits all here. So if you want to go the cheep route and go to Lowes and buy a fat max hand saw, that will get started, and if you want to spend more money you can go to Wood Craft and buy a couple Pax hand saws. Those are just choices close to where you live. Or you can go to some flea markets and pick up some cheep used saws, however there is a lot more knowledge needed to go that way. I don't know how much you know about woodworking in general so advising you becomes more difficult because I don't want insult you nor do I want go over your head.
so now that I have written a small paper here, here is the shameless self promotion, if you interested in learning about hand saws, I am teaching two workshops, one in September on saw sharpening, and one in October on handsaw use with some skill building exercises. Would love to have you join us. You can find more information in the classes, workshop and education section of this site.
good luck and I hope hear from you.