First of all, I am the only person in my area who has a basic understanding of Bitcoin. That is, in the region where I live, no one but me knows about Bitcoin.
From your text, I am assuming how much backward your area I don't know which country you belong but offering others towards bitcoin will be very difficult if you start this with your friends it is appreciatable.
The maximum number of friends I hang out with are unemployed. They are not uneducated they are all well-educated in their respective positions but due to a lack of adequate facilities, they are unable to find any employment.
If they are unemployed but qualify then they will understand Bitcoin easily. If they came to the bitcoin then they don't need to do a job and maybe after entering, they won't want the job. Bitcoin has the potential to change the life of people who believe in it
I didn't tell them only the positive aspects of the investment I told them the negative aspects. And I know the rest of my friends would also be interested in learning about Bitcoin
Impressive, if you told them about the positive side and after entering if they lost funds they will not trust Bitcoin again so it is very good to tell them the risk and negative aspects of it first so they can make decisions easily.
but I just don't know how to start teaching them about it. Because bitcoin cryptocurrency is completely illegal in my country. So how can I help my friends in this regard?
Simply you need to introduce them to this forum and I am sure they will learn more than other forums or videos. A lot of people will teach them how and what to do in Bitcoin and much more