Create separate module for each plot

I am creating a Shiny app using structure as below:

library(shiny)
library(shinydashboard)

source('./scr/data_preparation.R')

shinyApp(

ui = dashboardPage(

header = dashboardHeader(disable = TRUE),
sidebar = dashboardSidebar(width = 0),

body = dashboardBody(
  tags$head(
    # Note the wrapping of the string in HTML()
    tags$style(
  body {
    background-color: black;
    color: white;
  }
  h2 {
    font-family: 'Yusei Magic', sans-serif;
  }
  .shiny-input-container {
    color: #474747;
  }"))),
  ### changing theme
  shinyDashboardThemes(
    theme = "onenote"
  ),
  
  # 
  fluidRow( 
    column(12, align="center", offset = 0, style='padding:0px;',
           
           div(img(src="Picture2.jpg", height='100%', width='100%'))
    )
    
  ),
  
  # 
  br(),
  box(
    
  ),
  box(
   
  ),
  fluidRow(width = 12,
     
  )),
  
  fluidRow( ),
    
    fluidRow(

    ), 
    fluidRow( 
  )),
  
  
  column(8,  
  box( width = 12, background = NULL,
  fluidRow( background = NULL,
       
       plotlyOutput("plot1"))
  ))))),

server = function(input, output) {

# Create a "data_source" reactive variable
data_intacc <- reactive({
    data <- ind1
    return(data) 

})


output$plot <-renderPlotly({
  
  data <- data_intacc()



    
    
}) 

}
)

I want to organize my code so in the last fluidRow of my UI I will have 2 boxes.

In the left box I need to have a Select box widget. Based on this selection I need in the right box to be shown an interface (other widgets and plot).

Because this interfaces are numerous (different plots) I want each of them in a single module .

I am reading some sources about Shiny modules but still I cannot make it work for my case.

Can you please help with small example?

Regards