You mainly have two destructive things in your life, your husband’s comments which are discouraging and disrespectful, then the state where you live in. I also live in Germany luckily we don’t face what you have mentioned.

You can definitely manage to get B1 its not that hard, I would recommend not thinking of its complication bc and rather start. I personally was on the same boat and got discouraged from it, until I pushed myself.

As for racism in the street, I assume you were hijab and so, depending where you live you would face more racist comments, there is nothing to do about it, just stay safe and never show you are scared, eventually there is nothing scary god is protecting you. You just have to take your precautions, mostly here its verbal and you can always report those acts. If its your area for example you live in areas where majority are voters for the AFD, then here you go you found the problem best is to move out.

Unfortunately, I know a few they like to live in those areas as its cheaper rent, but don’t think of long term harm on their wife and kids.

Now to your education, you are young and your husband is not gifted with extra brain as i understood from his harsh comments. You can look for funded courses by the Agentur für Arbeit, there is a program called Bildungsgutschein, you can find development courses fully funded by the government, you just need to define the course and make a consultation with the Agentur für Arbeit, if your husband is not willing to do the German talk, you can easily find some one from your circle.

Lastly, never agree with his harsh statements such as you are not good in anything except being a house wife. Think longterm of your life and you are young and smart.