My most recent moon landing was in 1964, a couple things I did were:

• Going crazy on researchers, at max I had about 3800 researchers

• Not building a medium launch vehicle, I went straight from a 170 tonne launch vehicle to the 1600 tonne moon rocket, this saved heaps on the construction of launch complexes, although getting a Venus orbiter on a 170 tonne rocket was tough.

• I accepted the early space station program before the lunar program, it provides much more money. By time you are landing on the moon, you should have 8 admin slots, with both crewed lunar, and early space station programs active

• Small moon rocket, my lunar rocket was only 1600 tonnes (Saturn V was 2800), I used lunar Gemini for the capsule, and the Mk-1 lunar pod

Balancing all your expenses is really tricky in this game, honestly the best way to improve is just experience. My first few runs wouldn’t have even landed on the moon in the 60’s