Moses' work was very specific. Give emphasis to essential pursuits, master two or three trades, and multiply work by involving others. As God's representative, no one had more understanding, training, or favor than Moses to teach God's word. As God's people, our main duties are to worship, teach and serve. That will make your load lighter, because they will share it with you.
Some people find it hard to empower others.
I call it the problem of the will, the problem of the heart, and the problem of lifestyle. Leaders with anxious hearts worry that others are not as good, something bad will happen, and keep looking over people's shoulders. The lifestyle manager is the obsessive-compulsive kind who is busy no matter what, cannot and will not stop, and probably work on vacation. Moses places reverent, respectable, and reliable leaders to lead thousands, hundreds, fifties, and tens. A friend told me how busy, tired and helpless he was in his work lately.