Textbooks:
Introduction to Stochastic Processes With R, Robert P. Dobrow, 2016.
Introduction to Probability Models, Sheldon M. Ross, 2019.
Other references:
Introduction to Stochastic Processes, Greg Lawler, 2006.
The following references provide rigorous treatment of stochastic processes.
Stochastic Modeling, Nicolas Lanchier, 2017.
Probability Theory and Stochastic Processes, Pierre Brémaud, 2020.