Using miRSCAPE in bulk mRNA

Hi, I have a few questions about the usage:

1. Is there any pre-trained model I can use? It seems I have to retrain the model from scratch instead of using it right away to predict miRNA from my bulk mRNA data.
2. I have raw counts on my bulk mRNA and miRNA. Do I have to normalize that first, or can I just use it to predict miRNA?