Hi JP Admin. Thanks for your indications. I installed Joomla 5.0.2 and I backed up my staging site; now, before going on I need your help again.
1.)
I unzipped the "Artist" template package and inside I did not find "template_zip" but several files and folders, including the "Template" folder as depicted in the attached figure. To install version 1.3.17 of the template, without losing my work in progress, should I zip this "Template" folder and then proceed to install it from Joomla 5.0.2?
No, just install the file tp_artist.
2.) Can you assure me that the installation won't cause me to lose my current jobs?
No. i can't! If you make a backup beforehand and save it locally, if there is a problem you can restore the page from the backup.
(You should always make a backup before making any changes to the site!).
3.) After that, should I install the Ulkit 3 Gallery Text 1.2.3?
See the post of joomlaplates.