Ah, position of the stand!
This has been one of my big bugbears, partly due to eyesight issues. My peripheral vision is not as good as it was, neither the ability to quickly shift focus. All age related, added to extreme short sight, blah blah moan! Trouble with the harp: there's a large distance between the nearest and furthest strings, the music is to the left. To use the score while playing involves quick changes of focus and rapid eye and/or head movements. So while reading, the stand needs to be in the optimum position which will probably vary from player to player. I splay out the tripod feet as wide as poss, then they are respectively one to the front and one just behind the harp left feet. That brings the score roughly to the middle of the strings when the harp is upright, and when the harp is tilted the music is roughly at arm's length, not too high.
However, for the issues mentioned above, I find I'm having to learn more and more by heart, as using the score I'm much more likely to lose my place on the page, or I'll lose my place on the strings if there are jumps that I can't place in advance. Another option is to play by feel as much as poss which is a tortuous learning process for me! Though I have surprised myself when I've stuck at it sometines.
If you haven't found Christy Lynn's site, do have a look. She is very clear and engaging about all sorts of beginner techniques and issues. Here's an episode where she deals with eyesight issues and some interstind music stand ideas:
So nice that the harpists are back posting!