I would recommend La Tertulia
It's a lot more inviting than most coffee shops in Amsterdam, doesn't feel like a dank basement, very friendly service(seems to be run by several generations of the same family, no idea if this is true never asked), has a patio on a canal, doesn't blare house or D&B, is not inundated with loud youths and has a number of board games to play. It's where I generally take my mum and dad when they visit. Also the pot and hash are quality.
I just released this app, you can compare weed prices and find the cheapest place, search for strains, find coffeeshops menu e directions. All of this offline! Check it out https://play.google.com/store/apps/details?id=com.alessiodelmonti.wiet
Here get this set for the banger, it will give you one of the latest banger systems for cheap with a dabber too and matching carb cap. https://www.amazon.de/Quarzknaller-Wasserleitungen-Gl%C3%BChkugeln-Silikonwachsbeh%C3%A4lter-Wachswerkzeug/dp/B08PFBTRM8/ref=mp_s_a_1_9?crid=S3XC8U5CXNRU&keywords=dabbing+nail&qid=1663874527&sprefix=dabbing+nail%2Caps%2C146&sr=8-9
I use this dab rig but really you can get any as long as it fits the nail.
If you don't need a special banger and you just want all ij one, provided you have something to use as a dab tool. https://www.amazon.de/RORA-Honeycomb-Rauchwasserpfeife-Bubbler-Banger/dp/B089KH4TNY/ref=mp_s_a_1_1?crid=RSIAIDAPNJLD&keywords=dab+rig&qid=1663874672&sprefix=dab+rig%2Caps%2C147&sr=8-1
Don't smoke joints with shatter, it's honestly not a good way to do it. You need a lot of plant matter to make it work
If you want to save a euro or two over buying a ticket at the counter on the day, you could buy a ticket in the NS app. (Android link, but I'd be shocked if there's not an iPhone app too if that's what you have.) This has always accepted whatever card I've used in it, and it gives you a QR code in the app that you can scan at the gates.
As far as the language goes, try using flashcard tools like the Beginner Dutch app and the StartFromZero_Dutch app to learn simple Dutch words and phrases daily at your own pace and convenience.