Canman

Hi, I'm new to woodworking. I'm trying to mimic a plastic, two deck, playing card holder I saw. The sides are 60º and 1¼" deep. I purchased a lettering router bit that is 60º with a ¾" cutting depth, being that's all I could find. Would someone be able to tell me how to properly extend the angle down to the 1¼" depth? Would it be better to build a jig to hold the wood on an angle and use a straight cutter?

thanks.