Welcome, Craig. Since you’re interested in Christian music, it might be worth spending some time with an old fashioned hymn book, especially if you want to do some work with chords. I do this, even though it’s not my preferred kind of music. The hymns are familiar to me from my youth, have easy chording, and are usually not hard to play by ear. Once you get into BIAB, there are massive collections of free tunes, which it will transpose into whatever key you want and print. And there are, of course, lots of sites with Christian music. Also lots of inspiring stuff to play along with by the Blind Boys of Alabama, for example. Sax, clarinet, and trumpet sheet music works well, and oboe should be great.