There is no conflict between learning theory & being creative.

Music theory is the set of concepts that describes the nature of musical events. It is the process of mentally identifying the sounds that occur in music. We do this in order to build a consistent set of ideas to describe what happens in music.

Even players that don't read music or know theory still use the basic premises of music theory to get around the guitar.  They see the patterns of the chords, scales, triads, etc. and use them intuitively as a visual guide for playing.  Learning theory is mostly a matter of explicitly identifying and labelling those fretboard patterns to help you understand how the sounds relate to the patterns.

Some people don't want or need that step in the process.  If they can already play what they want, then the knowledge they have is working for them. 

But knowing what those fretboard patterns are called & relating them to the sounds they make is not going to limit your creatively.  It might help you see more possibilities.  But saying it might limit your creativity is kind of like saying learning to spell or use a dictionary is going to stop you from being able to write a story.

This tutorial covers the basics of music theory.

https://www.guitartricks.com/tutorial/495

Hope that helps.  Best of success with your guitar playing!