"Stop wasting hours searching Stackoverflow..." Terrible choice for an opening phrase to your website. You are putting yourself in a position against SO which IMHO is one of the few websites that are actually really helpful for the community (definitely not a waste of time). My honest advice, don't get cocky... at least not so early.
Definitely not a waste of time to search SO. Sure I've looked there and couldn't find the answer I was looking for. But if I think about all the answers to problems I've found online, 90% of those were answered by stack overflow. (existing questions, I've only had to ask a couple there)