Am I going "too fast" with my investing?

Around 6 months ago I started my investing in a global Index Fund. On the first 3 months I started relatively small by putting only 250€ aside to test the waters because I never owned anything close to a stock or a share in an ETF.

But on month 4 I felt confident in putting more money in the markets and was feeling underwhelmed by the small gains I was making and I also felt comfortable with my 12k in savings sitting on my bank for emergencies. Also the market's ups and downs no longer really affected me. As long as my P/L was positive I was okay with it.

So I shifted my strategy from the 250€ a month to investing every single penny that I didn't spend that month that was left from the last salary which significantly increased my monthly investment quantities without feeling like my savings were decreasing. It just started stagnating in that comfortable place of 12k saved up.

This strategy also helped me challenge myself to save as much as possible, for example when I think of buying something I immediately think about how that money could be invested and made me second guess if I should make that purchase. Obviously not in a way that is miserable.

I wanted to know your opinions is this too risky? Or am I on the right track if I'm comfortable with this strategy?