Watch this series of videos by Amanda Haberstroh, PhD, MLIS to learn how to use PubMed. Please note, the "new" denotes the new interface of PubMed which was introduced in January 2020. At this point in time, it is still the same interface as it was then.
Searching in PubMed
Searching in PubMed: Applying Limits and Filters
Searching in PubMed: Viewing Full-Text Articles
Searching in PubMed: Saving Your Results
Advanced Searching in PubMed: Searching for MeSH Terms
Advanced Searching in PubMed: Using the Advanced Search Builder