If you feel suspiscious of something then avoid engaging into it. Investment already has risk therefore you shouldn't be dealing with platforms giving you doubts already. Since you are in this industry already, there are other projects to invest but if you are not knowledgeable enough with most of the things, there are established tokens to choose from in order to lessen your worries.
I met someone on internet who suggested that I invest in a crypto trading platform that I didn't know about.
100% red flag. No matter how friendly and how pretty her profile image is just ignore it. An unknown exchange is another red flag. By the looks of it seems like you still deposit and will end up regretting it. If you know how binance basic exchange process and withdrawal works, then that's how a legit exchange works. An exchange that ask more deposit so you can withdraw the balance is pure scam, remember it.
Well there are instances as well that suggestions are good but yes an unknown exchanger is risky. It may not be a scam but if the exchanger won't be trusted by investors and users, then eventually it will more likely fall along with your invested fund.