u/GuyWithHelmets

Today I just got offered a sourdough starter and as much as I love baking, I've never baked bread of any sort. How do I maintain this starter? What are the basics? Any help is much appreciated.

If it's hard to read, the sticky note on front says the following:

650g Water

250g Starter

1000g Flour

20g Salt

(I assume this is the make up of the starter)