If you’re talking about siddur hebrew, then NJOP is THE place. They offer a 5 week course (once a week, 90 minutes per session) and the results are iron clad, and its a free course.
I know someone who did not even know hebrew is read from right to left, and by the end of 5 weeks, he could read from any page in the siddur. All it took was 5×90 minutes and 5 minutes of practice each night (that’s where I came it to the picture)
If I’m not mistaken, NJOP starts a class in early November.
If its Ivrit, you’re after, an Ulpan class is what you need, but I have no clue as to how good they are (or the cost of them)