I haven't had problems finding games, has been pretty quick but I haven't played a lot.
I do ok for a noob, especially since I hate playing shooters with a controller. Taking the weapons other people dropped helped quite a bit as they include whatever attachements they have equipped so it's always better than my AK or whatever it is you start with.
You can also level up through co-op first to get some decent weapons and perks. I find the co-op a lot more fun anyway.
~ PSN - Trent_Steele ~ Steam
~ Battle.net - Chief#6843