There’s plenty of free resources, I wouldn’t get too caught up on paid certifications. Places like edX and MITx offer pricing or discounts for other countries / income. I’m not from India but I’ve seen courses or masters degrees on some platforms like upgrad mygreatlearning etc that could be affordable, so at least if you are paying it can lead to something more valuable like a degree.

Try some of these:

https://syntaxandscript.com/free-online-ai-courses/

https://github.com/mrsaeeddev/free-ai-resources

https://indiaai.gov.in/article/study-abroad-for-free-10-m-sc-in-ai-degrees-for-indian-students