You hear virtual instruments much more often than you think. Much of the music you hear on television and in movies is composed using virtual instruments. More often than you'd believe because of time or cost constraints the original demo created using midi and virtual instruments will be used. I mention this because the advice, guidance and mentoring of composers that make virtual instruments sound real is what you are seeking. I'll post some links below that you will find interesting.
https://www.amazon.com/Guide-MIDI-Orche ... 0240814134
The book is very highly rated as a introductory guide and reference source.
https://www.groove3.com/tutorials/midi- ... -explained
Groove3 video tutorials are wonderful. At $20 I think you will find the money well spent. I prefer to purchase and download the videos for offline viewing and reference. I find information to be tightly packed in a Groove3 video so I may end up spending twenty to thirty minutes looping a two or three minute segment to fully absorb and understand the information presented. The format Groove3 follows in most of their videos makes it easy to find information later on.
https://composerfocus.com/the-art-of-mi ... on-part-1/
I don't know much about this but a quick review looked interesting.
Active forum with supportive participants.
https://www.amazon.com/Music-Sequence-C ... 0951721402
The book contains 20 different pieces to record, ranging from simple riffs for the complete beginner to music rewarding enough for the most accomplished musician. Each sequence introduces an important technical concept & a new musical skill, with detailed guidance on performing, recording, & editing. Note that this page also has a link to the publisher's website where three books, Music in Sequence and Classics in Sequence and Rock in Sequence, are available. The books are old but have the advantage of being written before many people became familiar with DAWs or sequencers so more emphasis is placed on understanding the underlying principles.
I hope you'll find this information useful.