Given that I have limited time before submitting my UCAS application in October, would you invest that time in learning Python?

I'm applying for undergraduate Neuroscience (/Experimental Psychology at Oxford) programmes and want to make the best use of the months I have left. If you think Python is worth prioritising, would you recommend focusing on a recognised course or certification, or would it be more valuable to build one or two small independent projects that demonstrate practical skills?

I'd also appreciate recommendations for courses or certifications that you think would genuinely strengthen a competitive UCAS application, rather than simply adding another certificate.