Hmmmm......
Well i see what you did there.
If you want really a graphics card get a EXP GDC BEAST:
https://www.banggood.com/Mini-PCI-E-Version-V8_0-EXP-GDC-Beast-Laptop-External-Independent-Video-Card-Dock-p-1011222.html
Search on Youtube how to assembly this.
What you need to get a eGPU on a laptop is:
EXP GDC BEAST
MONITOR
GPU
HDMI CABLE
POWERSUPPLY min 250Watts
If you have a GPU that needs dedicated power get a power cable for the GPU:
https://www.gearbest.com/other-pc-parts/pp_657256.html
The EXP GDC BEAST is connected to your PCIE x1 slot in your laptop motherboard so need to open the laptop.
Also upgrade your ram to atleast 6GB ram.
And the big problem is that your CPU is too slow to play games but its up to you to take these risk you can also build your own pc if i knew your budget.
You need to place the PCIE x1 in your PCIE x1 slot so remove that WIFI adapter and place the cable, you need a USB wifi adapter because if you remove the wifi adapter from the PCIE slot this means you have no wifi unless you place the USB wifi adapter.
Here is the Picture of your laptop if you open it up to assembly the eGPU and upgrade the ram, this is the LENOVO G50-30 opened:
https://imgur.com/a/aW481
Thank me later