Want to do like this

that is just a simple contact form
wordpress has many plugins to do this
https://www.ads-software.com/extend/plugins/contact-form-7/
https://www.deliciousdays.com/cforms-plugin

this plugin can do it from anywhere on site – not just a page
https://www.ads-software.com/extend/plugins/tdo-mini-forms/

Hi samboll and thanks… I install tdo mini forms, I followed all instructions and cant make it work, guest cant see a link to submit a new post… https://prueba.altoforo.com I didn′t know It would be so difficult…. ??

where did you put the code for the link?

I see a link in sidebar – “Default Form”
and it goes here
https://prueba.altoforo.com/?page_id=3
where the submission form is

how did you want it to work?
also, “Default Form” probably wasn’t best choice to name it :>)

Hey Marupw, thanks for showing me a great site!

Thank you guys!… I made it work!….

Im such newbie in WordPress… what do you recommen (software) to customize the defoult theme?…

the default theme is very hard to work with. I would find another theme you like
https://themes.wordpress.net

Thanks as usual samboll!