Can Lenovo - 15.6 Laptop - AMD A10-Series - 8GB Memory - 1TB Hard Drive - Black IMR be a good, fast computer? Especially for casual gaming?

If you can, please suggest be a better computer I can get (Cheap please)

Compare GPUs with websites like this:
http://www.videocardbenchmark.net/high_end_gpus.html
https://www.futuremark.com/hardware/gpu

Then compare those with the suggested GPUs the game designers recommend.

Newegg has a great search feature to find laptops with whatever specific specs you want.