Also, is there any way we can make our reputation good and be trusted by consumers?
Because definitely in starting this business there needs to be consumer trust in us.
It will be quite hard for you to get the trust and reputation in this forum moreover you are still newbies. It is normal for everyone here to use a trusted exchanger, I mean, P2P for selling and buying any coin here. It is normal to be more careful about anything because right now there are so many scammers that are also providing this kind of service.
But, I really appreciate your effort here because you are brave enough to say your plan here. Actually, it is possible to do that, promoting yourself as an exchange (P2P) in this forum and also on social media. But, once more, this will not be easy. You need to start several transactions with several people to make you trust enough. Or alternatively, you may need to build your account first right here, so, you may become more trusted again by having a higher rank. Sometimes, a plan needs more effort to realize it. But, if you are really willing to do it, you may face the easiness of every effort by struggling more.
I have a little capital, but I have a desire to start a business, namely to become an exchanger. I will open a service for people who may need a small gas fee to buy it from me, such as ETH and BNB or whatever coins consumers need.
I also have known some people who are doing this. Probably, you can start by offering to your friend first on your social media. So, you can gain the trust of your customers. I have some friends on social media who are also being exchangers and they gain the trust for a longer time, gaining from one to more customers, firstly, they got a reputation from their friends as customers. But, be careful with the new customers, and ensure that you are also not scammed by the new users. And once more, never disappoint customers or cheat to keep your reputation good.