Does ETF saving make sense with a short investment horizon?

Hello my ETF disciples, I have finally managed to build up an emergency fund equal to 3 months' salary. With the next salary payments I would like to invest fully in the MSCI World and would like some advice. My concerns: I have heard that up to €1,000 per year in profits remain tax-free, is that true and if so, under what conditions can I maximize this? I financed an electric car. The whole thing will start in October/September, then we