Help me plot this simple step pressure response of an integral controller using SIMULINK

I don't know how to use SIMULINK... Also, the science of control systems is my Minor field of research ... I want to enhance my skills for this field..

Help me to plot and estimate the characteristics of this integral pressure controller (see the attached block diagram) due to a step pressure signal (p1=220000) and a step disturbing temperature signal (T2=50). Take: (c=2.7) and (R=287) ...

Kindly, attach MATLAB m file if possible