Munich, is financing representable like this?

I don't dare for 10 years, then according to my calculation 400,000 remain unpaid, and save 6,300 every month with discipline, I don't want to feel so pressured, 3,300 are easier to manage, especially because I definitely want to have a child and will therefore have 2-3 months of lower income. Consulting my family is difficult, I come from very humble circumstances and these sums are just sleepless nights for them, friend circle also difficult, all men advise me to do it, women or colleagues are afraid of it. My boyfriend also doesn't dare because of financial instability. I am more of a gambler, what is the worst that could happen? even in the biggest crisis with a 40% loss in value, it simply belongs to the bank and I have no more debts and move back into my childhood room.

That is exactly the right attitude. Your openness to change will also show you a suitable solution in the future - if it is actually necessary. Yes, the price level in the Munich area is insanely high. Nevertheless, I consider the risks of a loss in value for a property in Munich to be very manageable.

The fundamental question of whether it makes sense to invest such a large sum in a very expensive and valuable plot with a house can only be answered individually, but as an "investment with residential value" your plan definitely works, and very well. Alternatively, the only other option would be to consider moving to a less expensive region, or even further out... but better not towards Tegernsee ;-)

So better quickly give a purchase commitment, otherwise, in my experience, someone else might do it. Good luck!

especially because I still definitely want to have a child and will therefore have 2-3 months of reduced income.

I wish you all the luck in the world that it works out.
Perhaps in light of this wish, it might be worth considering reducing working hours somewhat and dedicating a bit more time to the desired child.
Also, I MYSELF would not be dealing with real estate right now; as a medical professional, you know that, from a medical perspective, it's really high time already.

High salary, high amounts. Numbers seem to be correct if even the bank participates?! Your gut has to say yes too. Only the sentence:

My boyfriend also doesn't dare because of financial instability.

causes discord! But men often have the problem when the woman pursues values (alone) ;)

I don’t dare 10 years, then according to my calculation 400,000 remain outstanding, and saving up 6,300 every month with discipline, I don’t want to feel so pressured, 3,300 are easier to manage, especially since I still definitely want to have a child and thus will have 2-3 months of lower income. Asking my family is difficult, I come from very humble circumstances and these amounts are just sleepless nights for them, circle of friends is also difficult, all men advise me to do it, women or colleagues are afraid of it. My boyfriend doesn’t dare either due to financial instability. I’m more of a gambler, what’s the worst that can happen? Even in the biggest crisis with a 40% loss in value it simply belongs to the bank and I have no debts anymore and move back to my childhood bedroom.

As long as you trust yourself to handle everything despite having a child, do it. If there is fear, don’t change anything in life. With equity and that much cash, you sleep more peacefully.

If it's due to the high numbers:

Simply reduce your case (e.g. everything -50%) and then compare it with experiences from others here in the forum. This way you get a feeling of where you stand comparatively.

And one more note, 2-3 months break is not enough with a child. It will accompany you throughout your life. Maybe a nanny can take some of the burden off you.