There’s always a flip side.
A friend made me a piece of magickal jewelry: a spiral of jewelry wire. Wear it one way, it spirals sunwise. Flip it over, it spirals widdershins. In our north-centric way of looking at things, east to south to west to north is sunwise… but go to the southern hemisphere and you’ll see the Sun rise in the east and bear to the north before it sets in the west. We’d say it goes widdershins (as my little spiral does when you look at it from one orientation) but it’s the Sun, so by definition it goes sunwise. In the southern hemisphere, you see it from the flip side.
I had teacher who would not start anything new during a waning Moon. But waning-Moon energy is as powerful as waxing-Moon energy! Some things need to be diminished and dispelled.
Whatever you need to do, it’s got a flip side.
If you can’t wait until the Moon is in the phase you’d like it to be in, find the flip side of your intent. Improve my health = banish what’s harming me. Improve my finances = banish my debt. Tidy my living space = banish untidiness. Work with the energy that’s available.