Modeling - Basic Question

Hi everyone, I'm currently prepping for SA by working on 3-statement modeling and developing short write-ups for different stocks. When creating a model from scratch, what is the best way to get financial statements into excel? I finished WSO's financial modeling course, and there are fewer line-items than a 10-k I get on Edgar. I understand the flow of the assumptions through the case study they provide but am lost when looking at a company's 10-k. Any pointers on where I could start would be greatly appreciated. 

Also, I am worried that I won't be prepared for my SA stint and wondered if there was anything else I could do during the winter break other than short write-ups, 3-statement modeling, and reading different reports to get used to the language/metrics. 

Thanks again, and happy holidays.