Recently I have completed the Developer's Fundamentals 9.3 Collection. It is a collection that every developer must follow who is new to Sitecore. It's a complete power pack solution for Sitecore Beginners as well as for developers who have intermediate knowledge with Sitecore. This Collection starts with explaining every Sitecore terminology (item, content tree, templates, layouts, renderings, etc.) that is necessary to start with Sitecore. It also provides a sample project for working (Clothing Company).
It explains most of the concepts that a Sitecore developer needs to understand for creating a perfect website. It also explains Sitecore Rocks as well as Team Development for Sitecore (TDS). This collection includes Unit Testing, Serialization, different types of templates, template inheritance, make reusable components.
It also explains some of the concepts such as Dynamic Placeholders, Placeholders Settings, Rendering definition items, Rendering parameters. It even explains the concept of Searching that is Content search API, Solr. It explains additional concepts such as Forms, adding Additional languages, Language Fallback, Item Fallback, Dictionary, Media Items.
At last, it explains the process of making the Site live, managing error pages, performance testing, caching, tuning cache.
It's a complete package for Sitecore MVC developers. It explains all the concepts for starting with Sitecore. I will recommend learning Sitecore from this collection as it contains most of the things needed for starting with Sitecore. It will give you a perfect start to your career.
To make yourself comfortable with Sitecore 9.3, you can complete the course "Developer's Fundamentals 9.3 Collection" from https://learning.sitecore.com/.
Happy Coding (Coding for life) 😉