If you have a lack of knowledge, it's wise to do some learning. On the top of this website, in the top right corner, there is a "Help" link and within that, there is a huge "Wiki/Guides" section with quickstart and in-depth guides. Consult Youtube and see how others use OBS Studio. Try out the features of the program.
As start, to get a basic but working configuration of the encoder, use Tools->Auto Configuration Wizard.