See these links that help you to get started with Keil MDK 5:
( current version: MDK 5.41, released: Sep 2024, https://www.keil.com/update/relnotes/MDK541.htm )
1. Download:
https://www.keil.com/
How to download Keil MDK: https://developer.arm.com/documentation/ka004540/latest/
2. Getting Started Guide:
https://developer.arm.com/documentation/KGS1/latest
https://www.keil.com/support/man/docs/mdk_gs/
3. Video Tutorial „Setup Arm Keil MDK”
https://www.youtube.com/watch?v=d_O2tu5CMbQ
4. User Guides: https://developer.arm.com/Tools%20and%20Software/Keil%20MDK
5. MDK Editions: https://developer.arm.com/Tools%20and%20Software/Keil%20MDK#Editions
6. MDK Community Edition (free): https://www.keil.com/pr/article/1299.htm
Note: The MDK Community Edition has no code size limits and supports all non-commercial use cases!
7. Supported Devices: http://www.keil.com/dd2/
8. Access to supported product versions (for registered users):
https://www.keil.com/download/product/
(Note: Eval-Users can access just the latest release of Keil MDK 5, see 1.)
9. Legacy release of Arm Compiler: What should I do if I want to download a legacy release of Arm Compiler?
10. Online Manuals:
http://www2.keil.com/mdk5/docs and https://www.keil.com/support/man_arm.htm
11. Search the Keil Knowledgebase: developer.arm.com/keil-search
12. ULINK Debug Adapter family: https://www.arm.com/products/development-tools/debug-probes/ulink
13. Our customer portal: http://www2.keil.com/support/silver
14. Licensing solutions: Licensing User's Guide (arm.com)
Note: User-based licensing (UBL) is the only solution for new orders.
15. Our distributors: https://www.arm.com/products/development-tools/distributors
16. Arm Virtual Hardware: https://www.keil.com/pr/article/1298.htm
17. Arm University Program: https://www.arm.com/resources/education/education-kits
(18. Summary in a Knowledgebase Article: "Keil MDK 5 ...resources that help to get started": https://developer.arm.com/documentation/ka005384/latest )
19. Keil MDK 6 released: https://community.arm.com/arm-community-blogs/b/tools-software-ides-blog/posts/mdk-v6-released
Arm Keil MDK 6... Resources that help you to get started
Note, your local distributor is offering a 30 days limited Keil MDK Professional license key free of charge:
https://www.arm.com/products/development-tools/distributors
This i.e. allows to gather experience on Keil Middleware components:
https://developer.arm.com/Tools%20and%20Software/Keil%20MDK/MDK-Middleware