Memory struggles can be due to sleep issues. If each day's memories are not reorganized and stored in long term memory, short term memory can remain cluttered. You will do more by working on healthy sleep and such.

Much of short term memory can also be due to lack of focus, maybe due to distractions or ambient stimuli.

Brain training can help you learn to focus and even how to best remove or reduce ambient stimuli. Those are valuable skills to learn.