Low RAM! (pls help)... how can I fix it???

RAM is cheap enough that you should have 16 GB. You can get that for about 150 bux. That's cab fare these days. Go to tigerdirect.com or newegg.com customer service and they will coach you to get the right kind and install it.

But I wonder what makes you think you have low RAM. It takes some technical skill to find that information, and computers are smart enough to keep working no matter how much or little RAM you have. They use disk space instead, so the only way a user is aware of such a problem is that the machine gets slow. Maybe what you need is to find somebody to look and see what the problem actually is. It might be wiser to spend that money on a solid state drive.