Hi guys,
I could really use your help, I am very new with statistical analysis, however need to do a mediation analysis for a research paper.
I read a lot about SEM, and installed the package on Stata.

Only Issue is that my model includes

IV (categorical) = 3 layers/3 conditions = No Non-verbal cues, Positive Non-verbal cues, Negative non-verbal cues
Mediation = Credibility measured using 6 items = I do have an computed average for this
Dependent variable = I have 3 = propensity to invest, amount willing to invest, percentage/equity

So with that said, not entirely sure how to build this model correctly in SEM, given the situation with 3 manipulated conditions with the IV
And the mediation situation whereby 6 items measure the mediation = should I then just use the average within the SEM model?

Any help on how to approach the problem = honestly would help me greatly