How can I get better at Rust for job interviews? I am scared to give interviews.

I have been a backend engineer for close to 3 years. There was a time when I used to write code in Rust at work but now its just TypeScript + Node.js. There are lots of high paying Rust roles but I have just lost touch. I am getting interviews but I am just scared. I dont remember much anymore. I have watched a few theory tutorials so my conceptual understanding of basics like Ownership, Borrowing, Traits and error handling is decent. I will get into deeper concepts like Smart Pointers, Async Processing, Multi-threading too.

How can I get really good at Rust for development interviews? I know giving interviews is the key to get better but I should know something beforehand. I just want to know what I should be learning and expecting in such interviews. I dont want to be completely blank in an interview and embarrass myself.

One recruiter in an initial round said pub/sub systems. I could build Kafka as a pub/sub system but that is too much for an interview call. What should I be actually doing there?

This might be a dumb question to ask for someone who is experienced but I am fine embarrassing myself out here rather than being a joke in front of a recruiter/engineer in the interview. The industry that I work in is a very small world, the recruiters are interconnected.