You could use UMG for this... Make a widget that appears at the start of the level and then have it go bye bye once the actual game starts. I was watching a youtube tutorial that had something like what you wanted, but I can't remember what its called...... Also, I'm somewhat a noob myself, so there may be others ways of doing what you would like......
Here's the link to the DOCS on UMG. https://docs.unrealengine.com/latest/INT/Engine/UMG/
Follow this question
Once you sign in you will be able to subscribe for any updates here