In addition to the settings you have in place pre-launch, the first couple of days after launching your Google Ads campaign are important times in which you need to be diligent and check-in on how things are performing. Of primary importance is evaluating your bidding strategy type (i.e. manual CPC, enhanced CPC, target search page location, etc.) and where you have your keyword bids set.
During this 24-48 hour window, you’ll want to assess where your ads are appearing in the search results (average position), what the average CPC is for your target keywords, and how these metrics are translating into CTR, Quality Score, and overall conversions. Making bid adjustments to dial in your ad position and maximize Quality Score early on will pay dividends over time.