I'm doing this right now, and at about Month Four I was happy to find myself "talking" in the new language, although the conversations would probably be cringeworthy to anyone but my teachers.

This is without much immersion (due to lockdown then traveling), and the instruction is online, and I've been a lazy bum about additional study.

It's made me pretty optimistic about learning new languages in general, and I'm 50 so the brain isn't exactly a sponge anymore. More like a sieve.

You probably already know this, but Anki (or other spaced repetition methods) is amazing for retaining what you have learned efficiently.

I haven't used Anki yet but I want to try -- any idea which of the many mobile apps is best?

I just use the desktop app to create/manage the cards, and then on mobile use ankiweb in a browser. That seems to work very well for me.

The best thing is that even if some weeks or even months I do not feel like studying at all, I can just continue with the Anki decks for 5-10 minutes a day to make sure I continue to retain what I had already learned. It has not become my bedtime routine/habit.