Running in an engine properly is a bit more involved than one tank flat out then go fly

Follow the instructions that came with the engine first but even they rely on a little experience. The most critical thing is having the mixture set just right and for running in this means at a point where it's at a rich 2 stroke. But if you've got no experience this won't mean a thing to you so I'd suggest you go to a local club and ask someone to show you what it is. Ask to speak to one of the instructors who'll either show you or point you to someone who's got some expertise. Or just watch for a while and if you see someone hand start his engine then he'll be the one to approach