A young man is finding it extremely difficult to find halaal work

I am a young Muslim man who was born in a western country. By the grace of Allah, may He be exalted, I have learned more about my religion in recent years. I know that it is obligatory for the Muslim to live in a Muslim country, but at present I am not able to live in a Muslim country because of difficult circumstances beyond my control. But I intend to migrate when I get the chance. The problem may be that I am trying to find a job, and the problem is that the vast majority of jobs in the West are dubious, if not haraam. I will give you some examples:
1. There is a company that sells fresh produce and needs someone who is skilled in using computers and can help others in the company with their problems in using computers. The problem here is that if someone wants me to install a program or fix his web browser, it may be the case (in fact it is most likely) that he is going to browse websites or pages in which there are things that are contrary to Islamic teaching, such as music, or pictures of adorned women, and other things. Similarly, he may ask me to fix the printer, which may be used to produce printed material containing things that are contrary to Islamic teaching, such as images of animate beings and women, or things that contain kufr (disbelief), and I will carry the burden of sin for that, and I will not be able to refuse to help them. Moreover, this company may sell the produce to restaurants that cook these vegetables with pork or alcohol or other haraam things. Will there be any sin on me if I work in this company? What should I do?
2. Teaching is another example. For example, if a person wants to teach a secular subject in a non-Islamic school, he will be confronted with many things that are contrary to Islamic teaching. For example, he has to allow the students to go to gatherings that the school holds on the occasion of their shirki festivals such as Christmas and Easter, and the teacher has no choice, because the instructions come from the principal of the school and he has to comply with them. In addition to that, he may sometimes have to attend these gatherings, because they are held during school time. Sometimes he may be faced with words of kufr uttered by some of the students, and I will not be able to leave them every time; in fact I will not be able to denounce them. In addition to that, sometimes I may be required to be a supervisor on school trips. What should I do? I want to point out that the Islamic schools in our country do not have much support, therefore it is very difficult to get jobs in them.
3. Even if a person applies for a job in a company that sells honey, which is basically permissible, it is most likely that this honey will be used for haraam things, such as being put into beer or on ham (honey glazed ham), and other things that it is not permissible for us to eat and drink and so on.
Every time I look for a job, these dubious matters come up and I think that I may have to help with or participate in these haraam things. These doubts are not something imaginary, because these people do not care about issues of halaal and haraam. What should I do?
Finally, as I mentioned above, many jobs here in the West that may be halaal in principle become haraam or dubious because the people do not have any idea of halaal and haraam and they misuse almost everything. I do not want to consume income that is haraam or concerning which there is some doubt.
My question is: what are the guidelines that I can follow in looking for halaal work in the light of what I have mentioned above of doubts and problems? It is also very important for you to understand that I cannot leave work every time I find something that is contrary to Islamic teaching, because this will have an impact on my work record, and that will make it very difficult for me to find a job after that, and I cannot leave work every time I find something that is contrary to Islamic teaching.