I'm not sure where Kelso is, but if it's near Shoreline, Spokane, or Tacoma that's where the Tandy stores are. Most of us (as far as I know) buy leather online, or from a vendor that we don't visit in person. The problem is that you can't select the hide yourself. Fortunately most sheaths and small projects can be made using hides that have small blemishes. Working with a known vendor can help in this regard as well. I have had my best experiences with Hide House and SLC. I trust HH to send me a quality piece quickly and at a great price. Talk with whoever you choose and ask them to meet your specific needs. SLC has a rep for making good (great actually) if, by chance, you get something that doesn't meet your needs. Going with established tannery leather (Hermann Oak and Wicket & Craig in particular) will generally offer excellent leather depending on the quality you choose and pay for. These are just my opinions on buying leather. Certainly there are more experienced buyers here than me.
Choose vegetable tanned leather. You can do great things with it that you cannot with others (stamping and forming for example) and it plays well with steel where others may not depending on what you buy.
There are areas that you can improve on, but that's the case with all of us. Trying to improve with each piece is the best way that I know to get even better. Going slowly and thoughtfully has never hurt me either. Keep going and you won't likely be able to stop. You've been warned.