When i first got back my Amex after 10 plus years on bk , i was approved for a Green charge card and the Everyday card. My ED started at $1k. I used it for a car repair at Pep Boys to tune of $800. 2 weeks after approval, i took a chance, requested a 3x and recieved it. With Amex , ymmv.
Congrats on the approval. Follow the AMEX x 3 CLI guide that was mentioned or search the forums for it. It has good results. @NimbusIII is spot on with that advise, I second it. Cheers!