Hello @haris khan ,
Assume that you are preparing for the certification such as security engineer, please refer to certificate details below:https://video2.skills-academy.com/en-us/learn/certifications/azure-security-engineer
And refer to the free online detail:
After that refer to: Microsoft Certified: Azure Security Engineer Associate – Skills Measured: https://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RE3VwUH
Before starting to make use of the free tier to walk through the operating experience, it's suggested that you should firstly complete all the online free learning paths.
As the free-tier allows you to test every feature included in syllabus, however, you may spend a lot of time understanding the charging mechanisms on how to carefully spend the one month limited $300 credit. By means of that 30 days free tier with $300 credits is absolutely not enough for the test even on using a computer instance only. Even you can use the cost and billing center, pricing calculator, or pricing & settings page to give you a better estimate of your monthly consumption. But it will take you a lot of time to do it.
Please let me know if you have any questions about free tier, i have spent over 3months to test how I can keep the minimum charge but enable a compute instance to run within free quota. it's not easy.
For enabling certification purposes, taking Instructor-led courses can make your life easier. ^^
****Please help click Accept answers if comments can help. thanks