Contextual learning — acquiring Dutch in the context of topics you already care about — produces faster vocabulary retention and more intrinsic motivation than generic coursework. If you love cycling, follow Dutch cycling commentary, read Dutch cycling journalism (Wielerrevue), and learn cycling vocabulary (renner = rider, wielrennen = road cycling, koers = race, het peloton = the peloton). Your existing passion provides the schema that new Dutch vocabulary hooks onto.
Domain vocabularies to explore based on interest: football/soccer (voetbal — enormous in the Netherlands and Belgium, excellent commentary available), cooking (koken — Dutch recipe websites and cooking shows), Dutch history (de Gouden Eeuw — the Golden Age — has vast online Dutch content), gardening (tuinieren — the Dutch are passionate gardeners), music (muziek), literature (literatuur). The VPRO documentary channel produces high-quality Dutch documentaries on virtually every topic — available online with Dutch subtitles.
The interest-based approach also works for grammar: if you love Dutch history, you will naturally encounter the simple past tense (used in storytelling and historical accounts) far more than in a general Dutch course. If you follow Dutch politics, you will encounter formal register and complex subordinate clauses. Let your interests pull you into the parts of Dutch grammar and vocabulary you need most.