I am going to continue the conversation we had when you Pm'd me.
I Would like you to do the same, Thanks.
I would get a RX 550 2gb or a GT 1030 2gb
Some other options would be a Used 750ti, or a Radeon R7 7700 series Card, Like the R7 7770. Older GT Series, Like the GT 710 or a GT 610 Or similar. I have a RX 460 that I got for 70 bucks, IF you could find it cheap like that it could be an option but the CPU will Bottle neck.
Keep in mind that you need a eGPU Case and PSU. Also that the GPU will be bottle necked by having very few PCI lanes
You would be better off getting a new laptop