Linear Programming steps

I watched your lecture and this is what I understood please correct me if I am wrong.

Linear Programming is used to deal with multiple limited resources (i.e. Material usage or Labour hours) and in the exam, we’ll be dealing with only two limiting factors in the exam (even though there could be many in real life)?

Step 1 : Define the unknowns in terms of symbols:
We define symbols to all products irrespective of whether they are limiting factor resources or not?

Step 2 : Formulate equations for the constraints:
We make equations only for limited resources (such as material usage and Labour hours). Can it happen that we would be given more products in a question but not all of them are limited so we have to make equations of only limited factors resource?

Step 3 : Formulate an equation for the objective:
Our objective is to maximize contribution made on limited resources but is it possible that we would have been given profit rather than contribution to see how much we’re gonna make on limited resources?

Step 4 : Graph the constraints and the objective:
There will always be two products with the limited resource (i.e. constraints) in Linear Programming because we can only take two products while drawing the graph like Product A in x-axis and Product B in y-axis?

Step 5 : Optimum Production Plan:
We need to find how many units are to be made of both products after adjusting for limited resources and calculate the Total Contribution made on those units?