The ability to handle ambiguity and how comfortable you are with ambiguity is one of the defining characteristics of successful entrepreneurs who ship product.
Your product development is a series of small decisions that result in trade-offs.
Ambiguity comes when each trade-off seems viable (or none seem viable) and there is no clear path forward.
Being able to pick a direction and move, even if it is not the right direction or the perfect choice, is preferable to deferring to later.
Deferring to later is a choice that only ever leads to no product.