My partner wants to watch porn but I’m not sure. Are there any good DVD’s for someone who is a beginner?

Be very careful with introducing porn into your relationship. It can be a lot of fun but if you are not sure it can also cause issues.
The biggest problem with watching porn in a relationship is that your focus or one person’s focus can turn from their partner to the TV. However, done right it can also be a great turn on. Talk to your partner about your concerns with watching porn. It’s vital to discuss boundaries but also to explore where turns ons might be. This is not about recommending a specific dvd but looking a particular genres of porn.
My advice would be to start soft. Something that is more romantic and intimate rather than kinky and out there. You might also want to try a more humours approach and watch a porn parody ( a porn take off of a movie or TV series). Watch this as you would any other movie to begin with instead of just truing on it during sex. Use it as some fun foreplay and sexy entertainment instead of a distraction during sex. Things might change as you watch more but this is a good way to start.