@Galios It's more preferrable to watch Bakemonogatari first than watch the trilogy I'll say following the watch order.

Kizumonogatari Trilogy is chronologically the First entry in the series, but Monogatari series is meant to be watched / read in non-chronological release order. So technically Kizumonogatari is the second season in the series overall, it CAN be enjoyed as a standalone / entry point (in my opinion). Though a lot of fans will say otherwise, and it might create some minor confusion, but I 100% think that it can be enjoyed without watching other seasons.