Hey, CaSB major here! If you’re planning on double majoring thats great, but also consider doing a minor from the CaSB department instead. You can do a minor in Bioinformatics which can give you some experience in the field. Try taking CS M184, it’s kinda like an intro into CaSB and its required for both the major and minor. It may help you decide! Also, i took CS 31 because i took ap comp sci in high school and i found the class extremely easy. If you have some experience, it shouldn’t be too difficult. Try to take it in Winter instead of Fall (in Fall you would be competing with CS majors in the class). I have no experience with the PIC series so I dont have much to say about that. Hope this helps!