Magento 2 Newbie: Why Is My Admin Panel Extremely Slow, Hurting Store Performance?

Hey everyone, I'm a complete newbie to Magento 2 and just diving into the world of e-commerce. I've managed to set up my very first basic store, following a few tutorials, but I've hit a major roadblock almost immediately.

My Magento 2 admin panel is incredibly, frustratingly slow. Even simple tasks like adding a new product, editing a category, or managing orders feel like they take an eternity. This isn't just an annoyance; it's genuinely impacting my ability to keep the store updated and running smoothly, which in turn affects overall store performance.

I've tried a few things based on quick searches, but nothing seems to make a significant difference. First, I checked my basic server specs. I'm currently on shared hosting, and I'm wondering if this is the fundamental bottleneck for an e-commerce platform like Magento. I've diligently cleared the cache, both through the admin panel interface and by running bin/magento cache:clean via SSH. I even tried disabling some seemingly non-essential default modules, hoping to lighten the load. Re-indexing commands (bin/magento indexer:reindex) have been run multiple times. I also looked into PHP memory limits and increased them slightly in my php.ini file, but there was no noticeable improvement.

From my observations:

• Admin page loads often hover around 10-20 seconds, which feels astronomical for a fresh install.
• Saving product information or configuration changes can take even longer, sometimes upwards of 30 seconds.
• Interestingly, the frontend of the store seems relatively responsive to visitors. It's almost exclusively the backend, the admin panel, that's acting as this major bottleneck.

So, my main question is: What are the most common causes for a significantly slow Magento 2 admin panel, especially for a brand new installation without much customisation? As a complete beginner, I'd really appreciate any specific guidance on diagnostic steps or initial optimizations I should focus on to improve this crucial aspect of my e-commerce platform's performance?