I am analyzing the effect of micro-influencers (those that have YouTube and no YouTube) on intention to travel. I have weather as a covariate and one moderator and mediator. I did a survey about this and used Likert scale in the answers so how do I analyze this in R? I want to show that micro-influencers with YouTube have a higher effect on intention to travel. Should I also do a SEM analysis to see what factors the questions load in? Please help!