Placement of adjectives with verbs?
'高飞' means 'flying high', it is a common set phrase

in the idiom '遠走高飛' , '遠'(far) and '高' (high) are adverbs; while '走' (run) and '飛' (fly) are verbs

'高'(high/highly) in "我要高飞" is functioning as an adverb for the verb '飞' (fly)

other examples of 高 as an adverb in common phrases

步步(高陞)  - continuously (raising high)

價格(高企) - price (standing high)