I started Portuguese in January with a flashcard app and a notebook. Six months later I can read a menu, follow a slow conversation, and embarrass myself at a bakery in a way the locals seem to enjoy.
The flashcards were useful for two months and then stopped being useful. The notebook is still useful. Speaking to a tutor twice a week was worth more than every app combined.
If I started over I would skip the first three weeks of grammar and go straight to listening. Grammar shows up when you need it.