How many hours for driving lessons?

I am in my thirties and really need to learn how to drive! I have tried to learn in the past, but found consistency was an issue in being able to practice, as I was normally doing this with friends. I had about 5 lessons as well, but was not confident enough for the test.

I was thinking of doing 30 lessons at 90 mins each, and spread them out over 3 months and schedule the test. I can likely do some extra driving here and there (maybe 1-2 hours a week with friends) but realistically would this be enough?