One "easy" thing to very quickly make your Finnish sound much closer to a native speaker is to learn Finnish pronunciations for the ABC's. Every letter is pronounced the same way no matter the word or placement inside word. For you Y seemed to be hardest and it sounded like Finnish U, but rolling of the R and Kiitos were on point 👍
I assume the reason for usually only ordering a drink for yourself is because until recently (2018 I think?) a customer was only allowed to buy one alcohol drink at a time, so ordering rounds was not permitted. Nowadays you can order multiple drinks at the same time.
You speak quite well, you only need a little practise on doublewovels (and Y is a wovel in finnish) so definetly go for the longer, harder works :D Just for the fun of it - in finland you will get by very nicely with "Täh = what". "Toi = that" and maybe an occasional "Noniin" or "Noh?" Mukavaa loppusyksyä vaikka paskaa se on kuitenkin!
In the video the woman speaking uses common language, rather than literate, so "Yks" is actually written "Yksi", we like to drop off the last vowels for some reason. "Sun" is actually "Sinun", same as "Mun" is "Minun", but the way people speak also differs greatly on what kind of dialect they are speaking. But since everybody is taught the same literate way of speaking and writing, there is always a common language between all Finns, were they from north Lapland or Savonia. (usually they would still very well understand the dialect itself too, but some words may differ and the way of speaking the language.)
Try to say those Hääyöaie: It means wedding night plan and contains a lot of vowels in a row. And Hyppytyynytyydytys, could mean, for example, the satisfaction of jumping on a soft surface.
It might be a bit more than watching a few YT videos to learn a language. Since you have lived abroad several years, I assume, that you can manage with your local language. So everything can be learned. If one wants to learn a language... It helps if you actually want know more about the everyday living, people, culture etc. Good Luck! Onnea matkaan!
Your pronunciation is pretty good, but one letter that needs more practice is "y". In my experience it's usually the one that's the most difficult for many foreigners, unless they have something similar in their language. Y is a vowel in Finnish and is pronounced more or less the same way as y in Swedish, ü in German or u in French.
Alcohol is quite expensive in Finland, and even more expensive at the bars. You kind of have to be wealthy enough to be able to buy drinks for the whole group and get by even after that evening:)
There are also words in the Finnish language that are easy to say because they are pronounced the same way as the English word. Here are one examples. Inside the () is an English word that is closest to the correct pronunciation of the Finnish word. Naisten (Nice Ten) Finnish word mean woman's
Finnish language is actually quite easy to learn. It's much easier than english for example. Since Finnish is pretty consistant, everything you learn can be used widely. For example, in every word pronounced, the emphasis is always in the first syllable of the word (so it is BAnana, not baNAna). For compound words the emphasis is always on the first syllable of each word the compound word is made from. There is no silent letters or letters pronounced that aren't written, and every letter of the written word is always pronounced, and every letter only has one way it ever can be pronounced. That means everything you see written you can always say, and everything you hear said you can write down. Spelling bees are obviously not a thing here, since everybody would tie for first place. There is no genders in Finnish language, so no need to think if it is supposed to be le or la, there just isn't anything like that in Finnish. There is also no articles, so no need to learn those either.
