Hi Berp,
Here's a copy of the Arbans for free.
http://www.mallstore.biz/books/NewArban.pdfThe Arbans was rewritten by a trumpet teacher "Pops" and he has a lot of good information on how to get started. Here's his site:
http://www.bbtrumpet.com/home-page/Another trumpet teacher that also has a lot of good information is Jeff Lewis. He is a jazz trumpet teacher which may fit with your sax playing.
https://www.jefflewistrumpet.com/He's got a great YouTube channel:
https://www.youtube.com/channel/UCo8llN ... -QFJoU_HBAI've taken lessons from him. Definitely look at his embouchure videos as it's really different than your saxaphone.
Here's is a free trumpet fingering chart/guide which would be helpful as you start:https://trumpet.biz/trumpet-tips/trumpet-fingering-chart/
There's also a free practice log which will help you track your progress.
Good luck with your trumpet playing.