Hi, welcome to the forum!
Some basic advice:
Make sure that you buy decent quality discs, don't go cheap with media, it's false economy. In most cases very cheap/budget media won't burn well, and even if it does the disc's dye will degrade much faster than good quality media. Also beware of fake media. If the price is too good to be true, then it most probably is. I'd recommend for you to look up your writer within this forum, read and learn the basics BEFORE you start burning, ask questions and other users will reply. Trust me, you will be saving yourself from a lot of hussle if you first learn the basics of burning/ripping/scanning.
When you burn a disc make sure you don't have many programs running in the background. It's best to burn under minimal system load conditions, which means that its most probably better not having antivirus running in the background, or downloading large files, or having too many windows open when you burn. Make sure that the data you want to burn resides in an unfragmented and relatively fast hard disk. Any memory-intensive or CPU-intensive background application can interfere with the burning process, especially with older/slower computers with anything less than 1gig of RAM, so you'd better leave the PC alone until the burn is complete.
Finally, here's a decent article regarding media quality. Make sure you read before you buy:
A lot of us learned the basics the hard way, via trial and error. A very costly way to learn, so explore this forum, and learn b4 u burn! Good luck!