bootstrap
To start or grow something using only your own resources.
Bootstrap refers to getting something started or improving your situation using only your own effort and resources, without outside help.
When someone bootstraps a business, they start it with their own savings instead of borrowing money or finding investors. A student might bootstrap their way through college by working part-time jobs and saving carefully. The word captures that scrappy, self-reliant spirit of making things work with whatever you have available.
In computer science, bootstrapping describes how a computer starts up: it uses a tiny built-in program to load progressively bigger programs until the whole operating system is running. This process is called booting up your computer. The idea is the same: the computer pulls itself up from almost nothing, using only what it already contains, until it's fully functional and ready to work.