Is there a conflict between dependent origination and right effort?

My current understanding of dependent origination is that things cause other things to arise and cease and ultimately it a big interconnected web of influences. If that's reasonably correct (on a provisional level) then what meaning does right effort or just effort generally have in that context. If I arise and cease dependent on other things then where does my own effort come into it? If I decide to practice the Dharma how does that come about? Isn't my decision to practice just the interplay of causes in a big interconnected web? I appreciate that this kind of questioning can be (rightly) criticised as metaphysical nitpicking. However when I meditate (or even just sit around and reflect) this kind of question comes up for me. It's like a little personal koan that keeps nagging at me so I would appreciate any input - even if it is just a reminder not to worry and get practicing.