how to Improvisating

Hi lee recently I bought your guitar theory book and I think this is a very nice good for me.

I am a intermediate guitar player and I have read some chapter in this book.I have a question that I have know lots of things inside but I still don’t have any idea that to improvising with jamtrack.Everything played by me always just sounds like playing scale and boring…. I have some friends beside me who also play guitar I can make sue they know very less theory but they can play very well and have lots of idea when improvising .Is that mean I might have no talent on this

thank you so much.