Justin - there are a number of ArcGIS Pro texts that are available through Esri Press - one of the latest ones that would be good to check out for a wide-range of 'skills' would be the new Top 20: https://www.esri.com/en-us/esri-press/browse/top-20-essential-skills-for-arcgis-pro
Also - if I were you - I would just leverage the Esri Academy and Learn resources - that way you can dive into specific topics that you are interested in - and there is a wide-array of material in those sites to check out.
ArcGIS Learn Gallery: https://learn.arcgis.com/en/gallery/
Esri Academy: https://www.esri.com/training/catalog/search/
Also - as you plan on moving on from your program - the ArcGIS Personal Use license includes ArcGIS Pro, ArcGIS Online, all of the configurable web applications, etc. It's a great way to build your digitial portfolio and keep your skills up (and it's really affordable): https://www.esri.com/en-us/arcgis/products/arcgis-for-personal-use/buy