How you approach this new collection depends a great deal on how much time you have, and what you know about the person from which you
inherited. My suggestion would be:
1) take an hour or two and slowly go through each binder or album. Use a Post-It note on the cover to roughly identify what's inside. Use whatever labels and language you want at this point: USA, Germany, unknown, non-USA, looks old, whatever makes sense to you.
2) now, work your way into more detail. You've shown us a small variety of stamps: a few fantasy/fakes, some postage dues, and some revenue/documentary (that $2 stock transfer appears to be a Scott #RD105 perfin, by the way). You'll need a copy of one or more Scott catalogs (just check it/them out from your library), or an app like Stamp Identifier to better get a handle on what you have. Note that stamps usually retail for 10-40% of catalog value, and a dealer would buy from you for even less.
3) start thinking about what you might want to do with it all. What I've seen so far I think is in total worth less than a small Starbucks coffee, but that doesn't mean that something won't surprise you. Use it all as a basis for your own collection? Sell or give away? These stamps are decades old, a few more weeks or months won't harm them while you figure things out.