Hello Fareed Nawaz,
Welcome to Microsoft Community.
WordPress is a free and open source blog software and content management system based on PHP and MySQL. It is understood that compared with the hardware requirements of laptops, whether the network connection is stable and whether the network speed is normal may be one of the reasons for page loading delay and high resource usage.
Let me be clear here, WordPress is not a Microsoft product, so we don't know much about it, and if you're trying to find ways to optimize your use of WordPress, I actually recommend you contact WordPress customer support directly, because they know the product better than we do.
And if you're looking for some Windows or Surface level advice, maybe I can offer you this:
Tips to improve PC performance in Windows - Microsoft Support
There may be some steps or tricks involved that you have already tried, so if you see a duplicate solution, you can skip and move on to the next one.
Here are some suggestions for the Surface that you may want to try setting the Surface for optimal performance, as well as placing the device in a well-ventilated location to avoid overheating and degrading performance:
What to do if Surface is running slower - Microsoft Support
If you still want some WordPress optimization advice, I recommend heading straight to the official WordPress forums:
https://wordpress.org/support/forums/****
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Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.
Best Regards,
Mitchell | Microsoft Community Support Specialist