I started during the pandemic in 2020 and have been doing weekly since then, and it’s taken my language level from “I can vaguely guess what this text says” to “I can understand native Spanish speakers well and mostly make myself understood, although my grammar isn’t perfect” (so probably from about A1-2 to B2). The lessons seem to average out at about $20USD an hour (and I do an hour a week), although there are cheaper teachers on the service in the range of as well (just did a quick search and I’m seeing some in the $10-15USD range as well).

I definitely use it as a supplement to Duolingo and other resources - I haven’t abandoned those completely - but the interactivity seems to make it stick in a way that other formats don’t.

I have been doing online private lessons through iTalki for Spanish learning and it’s really helped me to go beyond just Duolingo - it’s some conversation once a week plus some short writing exercises and I find that’s just enough to make it lock into my brain as a ‘usable’ skill. I would highly recommend something similar if you’re able.