Warm ups can make the difference between a good workout and a great one.
I noticed this when I played the trumpet too. No warm-up? No high C.
How does a Greek student "warm up"?
I've noticed that prayer helps. Surveying that day's lesson before doing a deep dive increases your awareness of what's ahead. Also, beware of the danger of over-studying. TMI is rarely helpful. If your beginning grammar has dozens of footnotes on every page, you might want to supplement it with a grammar that gets right to the point. Sometimes less is more.
Just a brief post to say hey!