Congratulation on your first AG! I’ve only done a half dozen or so, but (as said) it does get easier. The trouble with this hobby is that we keep stumbling along fixing what we think will help improve the process well before getting to sample the fruits of our labor.
I’m still not that happy with my efficiency either, 70% on yesterdays brew. Hopefully, we’ll both improve on that.
From your picture I see that you have the same Rubbermaid MLT as me. It is suppose to be 48 quarts. I haven’t checked, but it might not hold that much. Mine has been looking pretty full with much less in it. Are you using a stainless braided manifold?
Yesterday I brewed a Pale Ale similar to EdWort’s Haus and needed 7+ gallons from the mash to get 5 ½ into the fermenter. It looks like you have a 30 quart pot, so you may have trouble with that. A bigger pot so that you can draw more wort should help get your efficiency up.
Home Depot gave me a 44 quart pot because they didn’t have the 30 quart setup in stock. Borderline boil overs have made me happy for that screw-up every time I brew.
Start planning your next brew yet? Best luck.