Besides Stackoverflow, what websites do you Use to find coding solutions

I always just use Google for all my programming related searches. Usually it finds a stackoverflow result but not always. You will need to clarify further if you're looking for another answer.

Depends: for architectural stuff usually a mix of AWS, Microsoft, Martin Fowler, etc. For programming SO and the language/platform/SDK docs themselves. For infrastructure man pages, AWS/Microsoft for cloud, etc. All in all usually just going back to the root of the product.