It depends on how much time you spend on it each day. If you're really busy then you should set it to a year, if you plan on doing 3 lessons a day, probably 4-5 months, and one skill a day would be 2 months.

For me, it took one year (or around there), but that was probably because I was working on French too. In the end, it all depends on your own pace of learning, don't rush yourself, take your time and make sure everything sinks in ;) Good luck on your language studies, and have some lingots ;)

Thank you!