I used a nut milk bag that I purchased at my local health food store, a similar one can be found here. If you do not have one, try using a fine mesh strainer. It may not come out as smooth and pulp-free as would a milk with a nut milk bag, but it will surely get the job done.
If you would like to make this fully raw, just use 1/4 cup of fresh peeled pumpkin.
Find it online: https://staging.naderboraie.com/2014/11/pumpkin-pecan-milk/