lasernut123o :
But the case only has one fan. Is that ok for oc?
case fans only have to do with overall air flow in the case. this can affect cooling potential with your CPU cooler but not by a huge margin. You can definitely get more fans to put in your case though for more airflow. So no not really. Overclocking is hindered most by temps which is governed by the type of cooling you have on your CPU because the higher you overclock the more voltage you need to give the CPU to do so and this results in higher temperatures which requires a better cooler to keep in check. For a standard overclock of around 4.0 to 4.4Ghz you should be able to achieve this with the stock wraith cooler that comes with the CPU with ok temps. But typically for anything higher than about 4.2Ghz you would want a better cooler. To top this all off, higher clocked RAM will result in better overclock ability when on Ryzen so that is why I recommended the better RAM.
Be sure to do your research online about overclocking with Ryzen if you don't know what you are doing. You can watch videos on YouTube by LinusTechTips, Jayz2cents, BitWit and PaulsHardware along with a couple of others for videos on how to properly do it.