Is €25 a good amount to spend monthly on ETF’s?

So i have invested in the following ETF'S:

-SPDR Pan Asia Div Aristocrats (which i regret daily)

-Vanguard FTSE developed Europe

-Vanguard S&P 500 USD

And i started working recently so i'd like to put some money into them monthly, especially since i still live at home and can save almost 100% of my income, except gas, gym membership, etc.

Is €25 a good amount or is it too insignificant? I'm not a risk taker in general, hence the ETF's and i'd like to save a lot to eventually buy a place to live too.