It must be difficult coming at this from another language.
I can't tell you what to do, but you really should take some time to understand the difference between gender and sex - the UK is currently in a time of huge legal turmoil because the two concepts are what our rights are hung upon, and many feminists are fighting to prevent sex based rights from being replaced with gender based rights.
In my opinion, noone is cis. There isn't a female who fully conforms to every stereotype without exception.
We all have a sex that cannot be changed.
None of us have a gender, it is something others want to impose upon us, as per all the examples in your poem.
Gender is harmful, because all it is is unfair expectations and stereotypes that society attached to a sex.
If you are happy with a bunch of stereotypes being applied to your sex, happy with the idea that there is a feminine mind, that girls don't play football, or are good at maths, and you believe that what MAKES girls female is all of those stereotypes and not their biology, then you might want to say you were cis.
Your whole poem tells me that you know what makes a person female is biology. And that you reject stereotypes being forced into females.
That is rejecting gender, and understanding that oppression is sex based.
I agree with that.
Sex is the target.
Gender is the weapon pointed at the target.
Gender is harmful.
Believing in gender is like asking "which weapon would you like to be shot with, the pink one or the blue?"
It doesn't allow the option to get rid of the weapons entirely. It validates the weapons. It doesn't allow the consideration that sex should not BE a target.
Terms like cis and trans relate only to the gender (stereotypes) that are chained to each sex, and whether you 'identify with' the stereotypes chained to your own sex ('cis') or whether you 'identify with' the stereotypes chained to the opposite sex ('trans')
Neither allows for the rejection of stereotypes. Gender, and gender identity, is claimed to be something we should celebrate.
It isn't.