Advice needed on Google Search account structure

I'm looking for a Google Search specialist to provide me with a top level advice on how to structure Google Search account for a multi-product website/shop (IKEA type). Questions include: - Campaign structure. - What optimization practices are recommended to be performed on recurring basis? - What tests could be done in relation to optimization. Also, a few questions on recommended approach towards Google Shopping and mobile strategy for Google Ads. More precise questions attached and website url provided when agreed. It's a small project based on advice level.