* Salesforce Trailhead: This is the official Salesforce learning platform, and it's free! It offers a variety of interactive modules, trails, and hands-on projects to learn Apex. Search for "Apex" on Trailhead to find relevant learning paths. This is an excellent starting point and considered by many to be the best resource.
* Salesforce Developer Documentation: The official Salesforce documentation is comprehensive but can be dense. It's a great resource once you have some foundational knowledge, for looking up specific functions, syntax, and best practices.
* Udemy, Coursera, LinkedIn Learning: These online learning platforms offer numerous courses on Apex programming, ranging from beginner to advanced levels. Look for courses specifically focused on Apex and Salesforce development. Be sure to check reviews before purchasing a course.
* Books: Several books are available on Apex and Salesforce development. Search on Amazon or other book retailers for titles like "Programming with Apex" or similar phrases.
* YouTube: Many Salesforce developers and educators post tutorials and explanations on YouTube. Search for "Apex tutorial" or "Salesforce Apex" to find relevant videos.
* Salesforce Developer Community: This online forum is a valuable resource for asking questions, getting help from experienced developers, and participating in discussions about Apex.
In summary: Start with Salesforce Trailhead. It's free, well-structured, and provides a solid foundation. Supplement with other resources as needed based on your progress and learning style. Remember to practice writing Apex code frequently to solidify your understanding.