Spend one year to study multiple languages - bash, C, C++, Go, Python ... and even Mojo or Rust. 10-20 hours a week. Being able to read top programming languages is the best investment I ever made. You will become fearless and can see the matrix ;)
You'd have to be deep into ML Infrastructure to use C, probably via CUDA. No-one who develops or uses ML models touches C or even C++. tinygrad and llama.cpp are exceptions.