Any tips on launching a game?

With OG Creative, publishing and submitting to be featured seemed pretty straight forward. Hopping into UEFN, I have no clue what to actually do when I want to publish. I see options but dont know if I need to run a memory check or anything like that.
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Does anyone have tips on what I should do in order to actually launch a game when its ready?

-testing with a test code first before publishing project?
-Content Validation?

Going to search the documentation today but wanted to ask here for those who might know!

Followed these steps and was able to create a test code.