Are you able to recall memories visually? What does your bedroom look like? Are you able to see the memories spontaneously? If yes, try to to work with this kind of spontaneous visualization during meditation. This kind of imagination is passive, receptive. Whereas the issue might be, that you try to actively "construct" images with your mind.

It is also possible that you have to overcome some karma and struggle for you imagination. You could ask for assistance from the principal genie of Aries and work with the mantra "I", as described here:
https://glorian.org/books/practical-astrology/the-zodiacal-course/aries

Moreover, you can also perform the Sacred Rites of Rejuvenation and ask your mother for healing:
https://glorian.org/books/sacred-rites-for-rejuvenation