Dutch allows consonant clusters (medeklinkergroepen) that are far more complex than English typically permits. Initial clusters: str- (straat — street), schr- (schrijven — to write), spr- (spreken — to speak), spl- (splitsen — to split), sch- (school — school, pronounced approximately skh-). The sch- cluster is particularly Dutch: the s and ch sounds combine to make the initial sound of school, schip (ship), schoon (clean).
Medial and final clusters: -nst (kunst — art, gunst — favour), -rsch (herfst — autumn, dorst — thirst), -lft (half — half, as in helft), -ngst (angst — fear/anxiety — borrowed into English from Dutch via German). Words like strengths or sixths in English are considered extreme clusters — Dutch regularly does similar things. The trick: do not insert a vowel between cluster consonants, as many speakers of syllable-timed languages tend to do.
Practice approach: tackle clusters syllable by syllable. Schrijven: first practise schr alone — schr, schr, schr. Then add the vowel: schrij. Then the full word: schrijven. This articulatory chunking method trains the mouth movements needed for smooth cluster production. The word angst is actually borrowed into English from Dutch/German — if you can say English angst, you can say Dutch angst. Use this kind of bridging from known sounds to build confidence.