Hi!
You can change your own release additions shortly after adding them (a few hours? one day? I forget) automatically. After that, any changes are likely to need voting (and until they are accepted, it might look like nothing has changed, except for an orange highlight). If something is pretty bad (e.g. you want to tag with it and can’t or you want to add a discID and forgot a track) you can always ask for some help at this thread: Voting/Auto-editor Request Thread - #171 by rafwuk 
Otherwise, waiting up to 7 days will just get the edit accepted by default.
I’ve fixed one of the mistakes on that Bach album (JSB not being in the release artist). That said, for a new editor, you’ve gotten the most important part right: relationships are there! That’s great to see.
If you want, you can always write to me directly with questions if that’s more comfortable than posting publicly 
(but public posts are great otherwise, since more people can see them)