Hi, it may be easier to find information online. One can start off from a site like this

https://sanctuaries.noaa.gov/education/voicesofthebay/fisheriesfacts/basics.html

and then explore further.

It's probably not exactly what you are looking for since it's focused on New Jersey, USA, but I'll plug our Rutgers Extension introductory fisheries course. The coordinator Doug Zemeckis is great, and it may be something that will benefit you.

https://ocean.njaes.rutgers.edu/marine/IFISSH.html

https://ocean.njaes.rutgers.edu/marine/documents/RCE%202022%20IFISSH_Course%20Flyer_v1.pdf

On the statistical analysis side, I really appreciate Derek Ogle's work. There might be something there that's useful for you at this stage.

http://derekogle.com/fishR/

Caveat: I have basically no relationship with fisheries science.

This is a good one:

Walters, Carl J., and Steven J. D. Martell. Fisheries Ecology and Management. Princeton, New Jersey: Princeton University Press, 2004.

Also, the American Fisheries Society books, including "Fisheries Techniques" are helpful:

https://fisheries.org/bookstore/all-titles/professional-and-trade/55067c/