How do I open the case safely for this PC? ASUS G10AJ-US010S

The device listed under this name on your site looks different than the one that I have. I haven’t opened it since I purchased the tower 3 years ago at https://www.amazon.com/gp/product/B00SXR... . I want to open it up in order to clear out dust and look into upgrading parts such as the power supply. I purchased the Pro Tech Toolkit + Magnetic Project Mat Bundle, so those are the tools I have to work with