You can create another b.net account and add 5 starter accounts, try out 10 boxing up to level 20 see how it goes. Be sure to watch MaRai's 8.1 performance video as well.

As for your setup, you'll have to wait for a reply from someone knowledgeable about the hardware to give advice. I did some Google searching and your CPU scores pretty low compared to the most popular CPUs.
https://www.cpubenchmark.net/cpu.php...00+%40+3.30GHz