One note on test strips, your mileage may vary, but this has been a big help for me:
Make a little rig out of black paper with a slot-opening for the test strip; and slide paper through it. The idea is that you have your typical test strip (3,6,9,12,16 seconds for instance) but that each strip is the same slice of the negative, if you can visualize that. I much prefer this to the entire image being exposed in increments. I make my test strips based on the primary subject area of the neg, not the whole print. And I do my strips pretty big, if it's an 8x10 print, I use the whole 8x10 sheet with maybe 4 increments and dial in from there, and I try to move to the whole print after only 1 or 2 tests.
That said, 90% of my work these days is lith printing, so I just take a wild guess and maybe get 2 exposures on 1 sheet. And can't say how many of those I've torn in half in development to see how more development with less exposure works (but lith printing isn't a develop-to-completion process).
Either way, as many have said here - experience and intuition will pretty quickly get you to where your first-guess test strip is either useful as a test strip, or tells you what your test strip time range should be. Don't sweat it too much OP!