There are laptops with the R6 out there for under $500. eg. https://laptopninja.io/finding-the-best-gaming-laptops-under-500-dollars/
if you save up a bit more you can also get an Nvidia that's a lot more powerful
Adding more RAM might help. This will work and is usually pretty cheap but I don't know about the INtel HD... it might not even help at all. eg check http://blog.laptopmag.com/ram-upgrade-tutorial
Acer are best. Got an Aspire for light gaming and it's worked out well for me. Don't listen to Lenovo haters - they are also up there. All depends on your budget and your intended use