conception new bdd

Hy everybody,
i'm trying to do a database. I've created a new nation with some leagues but i've some problems.
In first, i can't get the national team into international competitions (uefa nations league/ Euro nations/ world cup fifa)
In second i would like:
insert the winner to the first league into champions league
the 2nd and the third into europa league
the winner to the national cup into eurpa league.

Please if someone could help me?

take a look over on the SI forums set ups like this have been done previously

lots of help there and download content to look at and duplicate

be aware there is still a bug with getting previous winner into some continental comps

I do not edit now until final patch is out no point too many bugs and the old issue with lots of files not working with final update in past