Since buying my Tenor guitar, in 2015, I haven’t done much more than play around with it – certainly nothing serious.
This is mainly because I found myself spoilt for choice in terms of tunings. “Standard” tuning is in fifths, CGDA, but they are also commonly tuned to “Irish”, GDAE (also in fifths, or Chicago, DGBE (like the top 4 strings on a 6-string guitar).