Poulson, B. (2019, August 8). Data science foundations: Fundamentals [Video file]. Linkedin. This is an excellent series, but a bit advanced. Sections 8 and 9 are recommended.
Frye, C. (2019, January 3). Learning Excel: Data analysis [Video file]. Linkedin. This series covers data visualization, hypothesis testing, data distributions, covariance and correlation, and Bayesian analysis.
Rosenberg, R. (2017, October 18). Excel: Analyzing your marketing performance [Video file]. Linkedin. This is a recommended resource, but it does not go into forecasting.
Boudet, J., Gregg, B., Heller, J., & Tufft, C. (2018). The heartbeat of modern marketing: Data activation & personalization. McKinsey. Read pages 65-71.