Some people really like Tae Kim’s guide, other people hate it…
Personally I struggled with it (mostly because of the refusal to use furigana), so worked with other text books that did use furigana, and came back to Tae Kim’s later and found it much easier second time around.
I don’t know if you’ve seen this already, but there’s a great post here with resources others have used and enjoyed, which might help you: The Ultimate Additional Japanese Resources List!
There are also online courses like Marugoto, or Youtube channels dedicated to teaching Japanese that you might find useful.