There's as much risk in doing nothing as in doing something.
Trammell Crow

In American English, the final g in the word ending -ing should not be dropped, but it should not be over pronounced either.

Don’t say: “I’m goin shoppin.” And don’t say “I’m going shopping” by releasing the g too strongly. To create the /ŋ/ sound raise the back of the tongue and let it touch the soft palate, which is the soft area at the rear of your mouth. Don’t release your tongue when you pronounce /g/, or just release it slightly. The mistake of saying “goin’ shoppin’ ” is that the tip of the tongue is touching the area right behind the upper front teeth to create a /n/ sound. And if you say “going shopping,” the mistake is that the /g/ is released too much.