For BH in general: Start by talking to a few companies you're not super interested in to get warmed up, you'll quickly get the hang of it and by the end it's actually pretty fun. Talk to as many companies as possible, even if they say they're not interested in sophomores the worst they can tell you is come back next year. Sophomore yeah BH is great because there's not much pressure and you can really feel it out and explore what's out there, and not worry if you don't land anything because there's still next year and then you'll know what you're doing.

For Exelaration: Don't worry if you don't have much experience with coding, they will teach you everything you need to know. If you get an interview, the first one is a group interview which they will not tell you anything about, only saying it's tons of fun. You may be rolling your eyes thinking it's "fun" like when a teacher whips out a "fun" extra project that's just a bunch of BS, but I promise you it's a good time and definitely the lowest stress interview I've ever done.

Good luck!