Yes, you can put them on your trade list from that set's checklist screen (easiest to do with Add Multiples feature). Then go to your collection screen from the drop menu under your name in upper right. Scroll down and there is a feature to match your trade list to other members want list, and vice versa. Works better if you have a want list entered too, as you will see if that member has cards you want, too. Really, it just takes a lot of exploring and asking questions to learn the features. But we have a very active trading community here, and somebody out there needs just about anything you might have available for trade.
Another useful trick is to turn on the trade notifications, and the site will alert you, either daily or hourly, if someone adds one of your traders to their want list. One of the most useful features of the site, because we have so many members adding things every minute of the day.
Welcome to the site!
I'm going to reevaluate how I collect after the new year. It's just getting way too expensive for the new stuff. Sometimes I just want to buy a pack, not a whole box or even blaster.