Enviro 1A03 was a super bird! With Bernier. He laid it all out for you, and walked you through every lab (which often ended early), and told you what was on the final. Didn't ever stress about this class.
Econ 1B and 1BB are good, I took them as evening courses and barely went, they were not hard when I took them.
Astron 1F is interesting and pretty easy if you've taken high school physics. But I didn't get as good of a grade as I wanted because of the project/paper.
Honestly tho, Math 1X and 1XX will be enough of a bird course, just take what ever you want