You have such beautiful curls!
I'm no expert but I'd say you have either 2C or 3A curls. I don't necessarily know how you could make your hair curlier. Maybe this could help? How to Get Curl Defintion
Do you use a product whilst your hair is drying? I apply pure coconut oil on damp hair and then let it air dry and it works for me, however you have to find what works best for your own hair. This could be a gel or a cream. I found this searching the site ---> Top 10 Curl-Defining Products