About Me

Sergio Medina — GCID Student at ULPGC

Who I am

Hey, I’m Sergio Alejandro Medina Ospina, a first-year student of Data Science and Engineering (GCID) at ULPGC, in Gran Canaria, Spain.

I’ve always liked maths and computers. When I found out there was a degree that combined both and that data and AI were becoming some of the most in-demand fields out there, the choice was pretty clear.

Right now I’m at that stage where I can hold my own, I write Python, I understand the basics of statistics, but there are still things that don’t fully click yet. That’s exactly why I started this blog. Because explaining something properly forces you to actually understand it.

You won’t find an expert here. You’ll find someone learning alongside you, someone who makes mistakes, googles why their code isn’t working at 2am, and writes it all down so you don’t have to go through the same thing.

If you’re studying anything related to data, programming or statistics — or you’re just curious and want to learn some maths, you’re in the right place.

Certifications

Getting Started with Linux Fundamentals 9.1

Red Hat Academy · 2026

Linux Fundamentals — terminal, file system, permissions, processes, and shell

What you’ll find here

This blog grows with me. Right now I’m in my first year, so the content reflects exactly where I am, but the plan goes much further:

  • 🐍 Programming languages — from setting up your environment to writing code that actually does something useful. No steps skipped.
  • 📊 Applied statistics — not the kind where you memorise formulas, but the kind where you understand what the data is telling you and why it matters.
  • ➗ Maths — the maths you need to understand what’s happening behind the code. Explained the way I wish someone had explained it to me.
  • 📈 Data visualisation — because one good chart is worth more than a thousand numbers in a table.
  • 🤖 Machine learning — not there yet, but that’s where we’re heading. When the time comes, I’ll document everything here.
  • 📁 Real projects — analysis with real data, not just made-up exercises. Because that’s where everything starts to make sense.

The thread running through all of it is the same: I learn it, I understand it, I write it down. If it helps you too, even better.

Some images on this blog are AI-generated illustrations used for visual support.

Get in touch

Got a question about something I wrote? Found a bug in my code? Or just want to say hi? I’d love to hear from you.

📧 Email: sergio@sergiolearns.com 🐦 Twitter/X: @sergiolearns 💼 LinkedIn: linkedin.com/in/sergiomedinalearns

I don’t leave messages sitting for weeks. Write to me and I’ll write back.