Sigh... Again...

You did not "used to be a hikkikimori"... You were shy, and antisocial, but the fact that you had any friends, and left your home for more than food & water makes you definitively not a hikkikomori... Please, everyone, yourself included, stop using that word to describe yourself being shy with girls, or just emo in general... That's not what it means, and it's just embarrassing even to we readers, to hear people describe themselves that way...

Anyway... You should, by this point, after going through about 3 or 4 girls here, be able to competently handle this... Of course Italian or any place would be fine; And I think already, several suggestions have been made about places to go, as well as sort-of pickup lines to use while having dinner...

You need to take that advice & go with it! Now get out there & take her to a dinner, and try to get to know her even better!