I've been speaking Dutch for 2 years now and low and behold I still constantly make mistakes. I certainly understand a lot and still consider myself fluent in Dutch but, mistakes fly out of my mouth left, right and center. The problem is also that I'm fluent enough that anyone I'm speaking with lets these little mistakes fly without pulling me up. Cue learnt bad habits.
It's not that I blame my conversation partners but, if the people I'm speaking with were as strict on me as I am on myself than maybe I wouldn't have so many loose ends when it came to my second language. Anyway, I digress.
The point is don't do what I did and learn the rules from the beginning it will take more time now but save you a bunch in the long run. If anyones got tips how to unlearn bad habits shoot them my way.
I hope you enjoy this video I've left all the resources to help with these issues in the description or you can find them here below.
Dutch with Niels pas, maar, alleen: https://www.youtube.com/watch?v=NYae9F2g9XM
'er' grammar pdf https://www.dutchgrammar.com/_word_docs/Er.pdf
Dutch with Niels prepositions: https://www.youtube.com/watch?v=gUuvwSUB_R8
de and het explanation: https://www.youtube.com/watch?v=3f6ppki9o54
All other Dutch resources are linked in the description for the video.