"To have a foundation" means to have a strong and stable basis or starting point for something, like building a house on a solid ground. It refers to having a good understanding or support that allows for future growth or progress. Full definition
For big goals that will take time, try taking small, strategic actions now so that you'll at least have a foundation in place for the future. (ngcareerstrategy.com)
Sea of Thieves has the foundation of an incredible experience. (polygon.com)
Once a thorough job description exists, you already have the foundation for the job listing. (inc.com)