Can you recommend any practical resources on the topic? Not fluffy business-orientated self help books like all the product management books that are recommended.
But also books on business strategy and marketing are essential. I read several at uni. Maybe pick up an HBR guide or FT book if you don't want to go for a full textbook.
They should give you more ways to think about problems, let you be more confident in ideas you choose, and reinforce the need to iterate quickly and only gradually commit more resources.
Most entrepreneurial advice could probably be summarised as: make products with new tech that solve real problems.
The new tech part means you get in before competitors, and solving real problems keeps it laser focussed on customers with important enough problems they'll pay for it.
It's no wonder so many fail when most people don't bother to study business strategy, entrepreneurship and marketing first.