To add on to Jarmonik's advice, you'll probably need to do a course correction before you get to the moon to fine-tune your arrival orbit.
I've never done a direct landing...have always gone into orbit first.
1.When you're approx 20k seconds (or ~6hrs) from lunar PeA, open up IMFD map program in the right MFD.
2. Hit the Menu then the Map button. This'll bring you into Map Mode.
3. Make sure source is set to your vessel. If it isn't, hit the SRC button, type "X" and ENTER.
4. Hit the PG button, then the SOI button. This will show the sphere's of influence. Make sure your ship is inside the lunar SOI for more accuracy.
5. Set reference to the moon. You can zoom in to look at your trajectory and see what adjustments need to be made.
6. Now click the MNU button. This will bring you back to the main menu screen.
7. Now open up IMFD in the left MFD. Hit the MNU button.
8. On the right MFD (which should be at the menu screen), hit the PG button, which tells IMFD to share data. Type "0" (zero), so that it will get data from the left MFD.
9. On the left MFD, choose "Base Approach".
10. On the left MFD, make sure source is your vessel. Same procedure as point #3 above.
11. Set reference to Moon.
12. Set target to the base you want to land at. You'll have to correctly type the base's name for it to work.
13. Use the PRV or NXT buttons to highlight the "Approach For" field. Using the + or - buttons, choose "Orbit insert".
14. On the right MFD, hit the button that says PLN. You may have to switch pages to see this button. This will show your planned trajectory that you're setting up in the left MFD. On the right MFD, the trajectory line should change to blue if you do this properly.
14. Here's where this get tricky. You need to set the target periapsis altitude using your left MFD. However, you need to look at the right MFD to see what your trajectory will actually be. The map program in MFD is the most accurate program for showing your actual trajectory. When you set an altitude in the left MFD, it will be different in map screen on the right MFD. Adjust your altitude in the left MFD until you get the desired PeA in the right MFD. You'll likely have to experiment a bit, but a good altitude if you're planning to land would be 100 km.
15. When you've got everything set up to your liking, engage autoburn on the left (not the right!) MFD. After the burn is completed, hit the PLN button on the right MFD one more time. Your trajectory line should now be green instead of blue and should give you an accurate reading of your approach.
16. When PeT is ~500 seconds, hit the MNU button on the left MFD. Hit the CRS button once, then scroll down and select "Orbit Insert".
17. The default screen in this sub-program should be set up to do a circular burn for the periapsis. Just engage autoburn, and you'll be put into a circular orbit.
OK, you've made it to the moon and you should be aligned with the base. The Go Fly in Space manual has a method for landing on the moon, but there's also a great MFD called "LOLA" (should be available at orbithangar.com) that will do the landing automatically if you're so inclined
. But you need to set up your descent orbit first. So....
1. Bring up Map MFD on your right MFD. Select the base you want to land at. Make sure that your trajectory goes over the base, or else you'll need to align with the base.
2. When distance to the base is 5.0M and climbing, burn retrograde until your PeA is between 10-15km. After this is done, you should be able to advance time. Then you should be set up for a landing approach.
Have fun!
Cale