When struggling with visualisation?

[Aaron p]

From the very start ive struggled to visualise prana rising up the spine, aswell as visualising the point between the eyebrows. It feels like i cant feel the point and im trying to imagine the actual point between the eyebrows but my eyes keep getting tired and moving and it distracts me. i cant hold one image in my perception, it keeps moving and shifting. Then i think, am i meant to be feeling the point on my actual body, looking at it with my actual eyes or literally just imagining my forehead and the point between the eyebrows as some kind of visual "point". Anyone else had issues visualising?