Learning how to finger pick your songs adds a depth and quality that cannot be achieved with a flat pick.
I am not sure if you songwriters know about James Taylor's guitar lessons. They are all free
.He shows how he finger picks all his favorite songs.
I sure could have used this way back when... Here is "Fire and Rain"
He has many others that are just fantastic.
He also plays them in 50% slowness with a Webpro cam so you can catch all the licks easily.
https://www.youtube.com/watch?v=OTjd4sna_4o