There are many ways for modeling opamp. One common way is to use manufacturer spice subckt, for example, TI LM324 subckt model can be download from TI website : https://www.ti.com/product/LM324?keyMatch=LM324&tisearch=universal_search&usecase=GPN-ALT#design-tools-simulation
However, you have to learn how to import subckt netlist for this task. As you are new to spice, here you can directly download Qspice symbols which embedded with TI subckt in its. As a result, you can run a simulation likes this with the symbols : https://forum.qorvo.com/t/the-results-of-the-communication-transmission-characteristics-appear-to-be-erroneous/22141/4