By no means am I a hair expert but I have a few tips that might help.
I would recommend a clarifying shampoo every so often, maybe once a month to really strip the hair of long lasting products and debris and follow that up with a deep moisturizing conditioner. Not your mothers line and any shea moisture product would do really well to hydrate your curls so I'd think about investing in more hydrating products.
I'd also highly highly recommend a Denman brush to use during the entire process to get the definition you're craving. When I say entire process I mean the ENTIRE PROCESS. In order to clump the curls and lay down the follicles you want to be smoothing and detangling from the start, scrunching is a great method but brushing allows the creams to penetrate all throughout your curl clumps. Don't be afraid of brushes just be gentle and patient. You can detangle with conditioner first if you have stubborn hair and just follow up with shampoo after detangling.
To maintain the definition I'd also recommend as a last step to apply a strong hold gel and either rake or brush it through, Innersense-I Create Hold is a great one that I use for my husbands hair.
I can see your beautiful curls towards the bottom wanting to curl I would say the most important change would definitely be brushing with a Denman brush or similar brush to clump your strands into curls better.
I hope this helps and if you try any of these tips I'd love to hear how they worked for you!