I wouldn't call myself a minimalist but I do try to have as less of an impact as possible. I rarely buy new clothes, only second hand and if I buy new things they have to be eco friendly, worker friendly, sustainable, etc. I take cold showers and lower the heating in my home because I don't need it that much. I rarely drive my car and am able to do everything by bike or public transport or walking. I eat plant based and I try to eat as much local produced food as possible. There's much more I can do and will do if I have the room and money for it.

But that's because I want to do this and can afford to do this. Individual efforts are not going to change the problems we face. You can do only so much if you have no say in the companies that exploit us and pollute the earth. Systematic change needs to happen and the proletariat needs to own the means of production so that we can truly make our societies greener.

That being said you can always start doing things yourself. It's always a good thing to lead by example.