I recommend that you be present for noon meal formation on Friday of PPW. IOW, be on the Yard by noon Friday. Even though formation is "just a lot of Midshipmen lining up," seeing it that first time is a pretty special occasion. Also suggest that you take a camera, and tissues if you are at all inclined to need them.
Plebes are usually released for their first Town Liberty immediately at the conclusion of the formation.
If you have time/money to do so, you can arrive earlier and go on tours of the academic buildings, or see displays about the different academic departments. However, you can NOT make contact with your Plebe prior to their official start of Town Liberty. In fact, if you are on the Yard and spot your Waldo prior to start of liberty, I strongly urge you to do an "about face" to avoid any possibility of contact that not only could, but WOULD get him/her into trouble.