I have great respect for all styles of growing & try to learn a bit on many, but happy to have you join the organic minority. Fine to start simple soil mix & add as you go. Insane to go out & buy dozen or more ingredients right off the bat. Add as you go & as you feel you need.
Yes shrimp meal is also chitin rich. I really like the Organic Nutrients Insect Frass. Can mix in soil, top dress, can even foliar or use in tea. At 2-2-2 a good mild fert. too. Also been using Nectar's The Kraken....crab & shrimp meal combo....0-4-0.
Actually you may wish to take a look at the Nectar approach too. A true organic line. I use it in combo with "traditional" organics....soil building & microbes.
Understand...much to learn. Me too. Continuous....a little at a time. Enjoy the ride.
Sunlounger looks great in pics. Pink flowers. His 1st strain. After Wildberry my interest is rising.