quicker way to place teams in the right regional division (within the boundary)

Working on a fictional Dutch tree, with regional boundaries for subdivisions.

So i'm manually placing all the teams in their correct regional divisions. But honestly, it's kinda boring to do so, and within the structure i'm working on, i'll have to do all reserve and youth teams as well. (And was planning to do a U16 too, but this might be a bit too much work for me)

So, right now i'm doing this

Create league, set boundaries.

Go to teams. Handpick them based on my own geographical knowledge and then

in case of first teams do this 'edit x-amount clubs' select desired league.

in case of reserve/ youth; create either reserve/youth team, then place it in desired league.

the latter specifically costs me a ****-load of time, as i have to do 450 teams individually (x2)

Any tips to speed this up?

I go to competition and add teams from there. I added some options to filter i i can easly find right teams. Its big job because i have about 1900 clubs in my lower league system but you have to do iz so...

Yes, I'm afraid there are no short-cuts or someone would have found them by now...

This might already be a bit quicker than the way i'm doing it right now. Going to give this a try. Thanks in advance.

-EDIT-

I can't filter on local regions when adding teams?

But i can use a filter in the 'clubs' view on latitude etc. That 'll get me started. Better use of filters, best tip of the day. (and maybe my life)

-Edit number 2-

No, that didn't work either. Local regions it is. Sadly, i have to make those first...

Why can't i just collect stamps for a hobby?