Tummy time

AB

I can’t find the right time to give my one month old his tummy time😩. If he’s not sleeping then he’s feeding. So he sleeps and when he wakes up he’s fussy and and cries because he’s hungry. Then after feeding he’s awake for a little bit but I don’t want to put him on his tummy on a full belly because I don’t want him to throw up or spit up. If I wait then he goes back to sleep...any advice?