JELLYMAN EDUCATION

I Didn’t Have a Grand Career Plan I didn’t begin with a perfect career plan. I began by learning one useful skill. HOW MY DATA CAREER ACTUALLY BEGAN I Didn’t Have a Grand Career Plan I had a chart. Learning Tableau opened the world of data to me because it was incredibly easy to begin. I didn’t need to understand databases, pipelines or machine learning. I could connect a spreadsheet, drag a few fields onto the screen and immediately see something useful. That gave me an entry point. I wasn’t...

Why Your First Dashboard Will Probably Look Terrible Your first dashboard probably won’t look professional—and that’s completely normal. EVERY GREAT DESIGNER STARTED SOMEWHERE Why Your First Dashboard Will Probably Look Terrible Don’t panic. Professional dashboard design is a skill you can learn. Most dashboards you build when you’re starting out will look terrible. Then you look at something created by an expert and think: “Why does theirs look so clean and polished?” Is it possible?...

What Is Data Cleansing? Real-world data is messy. Data cleansing turns that mess into information people can trust. BEHIND EVERY TRUSTED DASHBOARD What Is Data Cleansing? Before you can analyse business data, you often need to make sense of the mess. Real-world data is messy. Not because businesses are incompetent. It’s messy because businesses constantly change. Think about what happens to a company over 10, 20 or 50 years: • Employees and leaders come and go • Old systems are replaced by...

Learning Tableau Is Only the Beginning Tableau Desktop helps you build dashboards. Tableau Cloud helps the business use them. BEYOND THE DASHBOARD Learning Tableau Is Only the Beginning Building a dashboard is one skill. Delivering it to an entire business is another. If you’re learning Tableau as a student, your experience probably looks something like this: 1. Download some data 2. Open Tableau Desktop 3. Build a dashboard 4. Save the workbook 5. Done! That’s a great way to learn Tableau....

Stop Trying to Learn Everything in Data You do not need fifteen tools. You need a useful combination of skills—and somewhere practical to begin. BUILD SKILLS WITHOUT THE OVERWHELM Stop Trying to Learn Everything in Data You don’t need fifteen tools. You need a useful combination of skills. One of the biggest mistakes I see beginners make is trying to learn everything at once. Python. SQL. Tableau. Power BI. Excel. Snowflake. Databricks. AI. Before long, learning data feels less like starting...

Why You Need to Understand Joins Four joins can produce four very different results. Learn why understanding the data model matters. CONNECTING THE DATA Why You Need to Understand Joins Real-world information rarely arrives inside one perfect table. Real-world data is messy. Your customers might live in one table. Transactions in another. Products somewhere else. And the information you actually need? Scattered across all three. DATA MODELLING FUNDAMENTALS What Does a Join Do? A join connects...

Is Excel Dead in the Age of AI? AI and modern BI have changed analytics—but Excel remains an essential part of the analyst’s toolkit. THE MODERN ANALYST’S TOOLBOX Is Excel Dead in the Age of AI? New tools have changed analytics—but they haven’t made every older tool obsolete. With AI, Tableau and Power BI dominating the conversation, it is easy to assume Excel has become outdated. But walk into almost any real business and you’ll discover something surprising: Excel is still everywhere. KEEP...

MOVE FAST OR FOLLOW THE PROCESS? The same job can feel completely different depending on where you work. Startups tend to move fast. Fewer approvals, fewer layers, and sometimes the person you need is sitting three desks away. Large companies can feel like the opposite. Forms. Meetings. Approvals. Another meeting to discuss the previous meeting. But I’ve learned something from working across different environments: neither is automatically better. They simply teach you different ways of...

JOB POSTS ARE WISHLISTS like dating profiles One of the biggest mistakes applicants make is treating the job post like a checklist. Think of a dating profile: 6’4”. Full head of hair. Multimillionaire. Owns a yacht. Six-pack. Loves kids. Adventurous. Funny. Emotionally available. Michelin-level cook. Speaks four languages. Loves dogs. Plays guitar. Good luck. Companies do the same thing. The job post is what they WANT. Your job is to discover what they NEED. FIND THE REAL PROBLEM ONE...

JELLYMAN NEWSLETTER THE MISSING SKILL IN YOUR DATA ANALYTICS CAREECAREEr STOP MAKING THE SAME JOB-HUNTING MISTAKES Generic resumes, endless applications and focusing only on technical skills could be holding you back. Learn how to position yourself, stand out and show employers why they should hire you. BREAKING INTO DATA ANALYTICS JOB GUIDE Learn how to find the right opportunities, build a resume that stands out, position your experience and confidently navigate the interview process. START...