If you want to access Raspberry Pi from another PC or even phone or tablet, the best way to do it is with VNC. VNC stands for Virtual Network Computing: you can use VNC to access your PC from your phone, etc.
You need to be running PIXEL for this.
If you are on a clean installation of PIXEL, then go to Menu/Preferences/Raspberry Pi Configuration. Go to Interfaces and enable VNC. Then click OK.
If you have manually updated to PIXEL, then type sudo apt-get update then sudo apt-get dist-upgrade at the terminal. Then type sudo apt-get install realvnc-vnc-server. Then enable VNC like you would on a clean installation of Raspbian. I recommend rebooting your Pi before trying to connect.
Then, go to realvnc.com/download/viewer and download the VNC Viewer for the device you are using to connect to your Pi from. Run VNC Viewer and type in your Pi’s IP address. Then, click connect and type in your Pi’s login details. Then bang! You should see your Pi’s desktop.
Epic Chas Gamer 😎