Welcome to the community Ben.
I hope you visit often, it’s a place to move forward in Airtable.
—> 1) consulting my data not with a grid but with a kind of form
Any Idea for adding a control to go through the records ?
For this solution you may want to look at the page designer app.
You design your page/form to view the fields you want to see.
It lets you scroll back, forward & search for a record. A pro plan perk.
—> 2) as well with the same kind of view I would like to add or to update some data / records.
Any idea to build that kind of form view ?
You can build a form to populate your base.
Also; this link is a solution to linked table records.
Hope this helps
All the Best!
Pablo