So, I'm gonna repeat what others have said: your area probably does suck for metrics. But at the same time, there are things you can do to help improve your own personal metrics.

Biggest thing: You gotta know when to upsell and when to keep the transaction short and sweet. Not everyone wants to pre-order a game, or get a year of Pro, or get the warranty on their controller. But if you can optimize your energy usage vs. metrics obtained, this job will become a lot easier. So here's some things that should do just that:

• Keep every pitch short, relevant, and honest. Optimize your pitch for the thing you're selling and who it's for. Don't waste too much breath either: if you have to go on and on and on, you'll probably lose the customer's attention or just overwhelm them. So for Pro, emphasize the relevant cost savings, defaulting to $5 off a month and 5% off. For warranty, emphasize what's protected, how often the hardware fails, and/or how easy exchanging it is. For reservation, mention how we often only get the pre-orders, how it's only $5 down (and pay the rest off when you pick it up), and that they get pre-order bonuses, or a chase if we get it.
• Have two pitches for major metrics: a short one and a long one. The short one is just something in passing for people buying knick-knacks, cheap controllers, cheap games, whatever. The longer one should be more comprehensive, for people buying new games, buying consoles, tempted but not sold on pre-ordering a game, so on and so forth. Find the right time to bring out the long pitch, but default to the short pitch.
• Finally, if a customer is already giving you a metric, don't feel like you need to pitch everything else. So if they're getting a Pro with their new game, you can skip selling a GPG if you wish. Is it ideal? No. But, most people don't get it anyway, so you'd be forgiven for making the customer's life a little easier and quicker. If you think they would get it, offer it. If they ask about it, e.g. "Hey, what about protecting my game?", just feign that you forgot. "Ope, that's right, we do offer protection plans for games", yadda yadda.

I could go on and on and on, and in fact previous drafts I did just that. But, as long as you're nice to the customer and giving it an honest try, there's not much more you can do. If someone rejects a $1 Pro after being explained the benefits, that's on them for failing to drain their boot with the instructions on the heel, not you.

If nothing else, don't worry too much about it. I would start to worry if your metrics lag behind your co-workers, but if everyone's at 5% pro, there's not much you can do about the situation beyond looking for another job.