Create multipages with the same custom module

Hello. First of all, sorry for my english, i am not really pro with languages. 

I am building a custom module. At this point i did a page, a form and can send it to database. Now i need build another page for update the data inserted in last form. I dont want to build another module, and i suposse there are other ways to do it on same module. 

Some help/guide would be great. Thank you.

I have this code on routing.yml:
 

insti.content:
  path: '/admin/edicion_insti'
  defaults:
    _controller: 'DrupalinstiControlleredicioninsti::content'
    _title: 'Modificar insti'
  requirements:
    _role: 'administrator'
insti.agregar:
  path: '/admin/edicion_insti/agregar'
  defaults:
    _controller: 'DrupalinstiControlleragregarinsti::content'
    _title: 'Modificar insti'
  requirements:
    _role: 'administrator'

I am not sure if it’s ok or not.

Drupal version: 


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