Do you want to learn German? – If so, let`s start as soon as possible. But ask yourself first: Why do I want to learn German?—-
Well… depending on your answer you will be more or less committed for learn german….
In German we say: Ein bißchen schwanger geht nicht. – You cannot be pregnant just a little bit.
Same is with learning German: You need time during the week to make it worthwhile.
Otherwise it takes you forever learning German.