Unity learn premium free until June 20 2020 due to the health emergency is what Unity is offering to all users to improve their skills while being at home. Premium Unity learn will be free for access to all registered user from March 19 to June 20, 2020. Unity learn is a library of goal oriented projects and full tutorials offers content to Unity users created by Unity learn team and other sources like Pluralsight. Each projects, course and tutorial has a suggested difficulty level from beginner to advanced.
To start browsing the Unity learn tutorials library click on the following link :
By browsing the Unity learn premium library i suggest two tutorials that caught my attention :
https://learn.unity.com/project/unity-c-scripting-fundamentals : C# for Unity coding tutorial aimed at beginner level game programmers
https://learn.unity.com/project/creating-a-character-inventory-system-in-unity : How to create a character inventory system in Unity which is a needed implementation in lot of games
https://learn.unity.com/course/artificial-intelligence-for-beginners : Artificial Intelligence primer with lots of entities (NPC,enemies…) behaviours explained one by one.