Time series train test split

Hi all,
Suppose I have 6 months of data at weekly level (24 data points) and I want to forecast for the next two weeks.

If Im doing a train test split keeping let’s say 4 data points for validation. With this setting suppose i get a good arima or ets model.

My question is, at the time of forecasting, I’m actually predicting for the next 6 weeks then (4 in validation, 2 in prediction). Time series models become less …

arima data datascience forecast good next question series split test time series train validation