Hi Tproul. Welcome to the boards.
The majority of the people here use the Curly Girl (CG)method. It worked wonders for me. My hair was
"naturally fuzzy" before I started using this method. Now my hair is much healthier in so many ways. It is more moisturized, feels softer, has better defined and wavier waves, less spit ends, some shine (vs. none before). Anyway, I think it is worth checking out.
Here is a thread with pictures of people before and after CG.
Post your before & After CG pics
Here is a good introduction to the method.
Since your hair is fine, I think a protein treatment would be helpful. If you do a search on protein, there is lots of information. I found this article helpful.
The article is about black hair, but the information applies to all hair.
Some examples of protein treatments are nexus emergencee, joiko k-pac, Aubrey Organics GBV, Sally Beauty Supply Ion effective hair care. If you do a Protein Treatment, always follow this with either a deep treatment or a moisturizing conditioner.
There are lost of styling techniques that can help. I'll link a few that might be helpful. If those don't work, there are plenty more to try.
plopping (video in link)
Pixie curl diffusing
what is the pixie curl diffusing method?
Scrunching your styling products into your hair.
I'm not familiar with the products you are asking about, but plenty of people here are.
This thread has a list of all the acronyms people use. I jokingly call it the secret decoder ring.
(a blog to help new wavies, go to the how do I get started page)
2a (nc.com) 2bFi (Fia), very fine, thin, low/normal elasticity, porous, CG, doesn't get weighed down
Cowash: Tresemme naturals
Rinse out/leave in: Renpure Organics (red)
Curl enhancer: FSG
Gel: BRHG, Salon care aloe, Ecostyler Krystal (normal dews)
PT: ION effective care, IAgirl's gelatin PT
Low Poo: renpure (red), Ion swimmers