1 lesson per 1 or 2 weeks is sufficient to keep you in the rhythm. It's way better than doing a 4 week full time course.
The human brain learns by repetition and being able to process the experience. This processing can take several days after 1 lesson!
If you have 1 lesson every 1 or 2 weeks, and also spend some time to study the theory, then you'll be fine.
As a great advantage you'll be flying in many different weather types and seasons, instead of 4 weeks of great weather while not having flown under heavy clouds or in light rain. It's very valuable to do that with an instructor to gain confidence that the aircraft can do that
It also let's you enjoy the whole flying process over a much longer time period and isn't such a burden on your cash supply. If you don't fly more often than once every 1 or 2 weeks after getting a license, don't do it before getting a license.