my question to the community is if there is any say organized book, site, or any robust resource designed to grasp a solid background on nextflow writting/scripting nextflow pipelines

Did you already go through https://training.nextflow.io/latest/

Thanks. Will check this out !

Definitely check out the training, it should give you a solid foundation of what Nextflow does and how to write a basic pipeline. If you run into any issues with more advanced topics, the

#nextflow-help

channel on the Nextflow Slack is a good place to ask about anything that is not specifically nf-core related. If you want to use the nf-core framework for your pipeline, have a look at https://nf-co.re/tools.