… Should I create a #MusicBrainz account because I have CDs at home which are missing data (like pictures) on the database…
look at me, I've created a CD on #MusicBrainz https://musicbrainz.org/release/2de0df68-72dc-4014-9019-f800a87c17d6 (I've tried to generate AcoustID etc., but I've absolutely no idea if I did all this properly)
Release “Horizons chimériques” by Cap Horn - MusicBrainz

Format: CD

why the length of the tracks don't appear is a mystery to me (maybe it just takes time?)

@harmonia_amanda If you read in the CD with MusicBrainz Picard, select all its tracks, and group them, there should be an option to upload the data to MusicBrainz. This should include the correct track lengths automatically.

... At least that is how I was successful. The tool and the site take some time getting used to, though. Had a bit of a fight with some of their options myself. 😔

@moranaga I've only found how to upload track by track for now, there is probably a way to say "no, all these at once" but I've not found it yet
Joindre un ID de disque à une parution — Documentation MusicBrainz Picard v3.0

@jocker666z …ah, va falloir sortir le lecteur CD externe pour relier à l'ordi, j'ai pas récupéré ce type de fichier en faisant mes copies (je ne sais même pas quel logiciel les génère ?).

Je garde les CDs physiques parce que les fichiers ça se perd et les disques durs ça meurt. Et je fais toujours une copie du CD sur mon ordi parce que 1. c'est plus facile pour l'écouter, 2. les CDs ça se raye et ça se casse.