so I am at the stage in my map where im adding light to it. first question is can I implament a sun some how or do I just put a light wayyyy up in the sky and really increase the intensity and radius? second question so my map is out side and inside. if there is a sun feature and im just noobish and cant see it then good but if not when I put a light outside and increase the intensity I lose my light on some angles back to pitch black??

You can change your worldspawn settings for things like sun, here are some examples:

World Spawn Settings

Thank you!