Don't panic, you'll be ok.
You certainly won't be the only member with an infraction, and it doesn't mean you're any less valued here. Just because you've got an infraction, it doesn't mean we hate you. We give out lots of them every day, it's not a personal attack and it doesn't mean we think less of you. Having an infraction does mean that you can't open a Marketplace thread, but other than that, it's just a way for us to let members know the rules that allow us all to co-exist together and have constructive discussions.
Infractions expire after a set amount of time, as long as you don't break the rules again. So within a couple of months your record will be squeaky clean once more. If you have a question about your infraction, or think you have a case for it to be lifted early, you can contact support. Like we explained in this thread, be civil and remember that they are not obliged to lift your infraction.
WilhelmScream also covered this in their Three Commandments thread.