Originally Posted by
nomilk
Ireland is not in Schengen.
I was going to question this, but a quick check on Wikipedia confirms!
@topicstarter: apart from passports, immigration, customs &c, be prepared for Covid19 checks. For the moment there are almost no limitations in Europe, but they might come back, since mutations of the virus are spreading. I would recommend to get a vaccination, and inquire about getting a certificate that will be accepted in Europe.
For fields with customs/immigration in BE, consider EBAW Antwerp, EBKT Kortrijk, EBOS Oostende. OTOH Brussels, Charleroi and Liege are too big and too busy and on the expensive side.