newbie often run into losses when investing in new projects. ,i once bought new coins but i can't resell them. i think i have been cheated

what can you suggest to us and how to find out if the project is a scam? Is it true that new Coins can give big profits as people say on youtube channel?
You can't resell because the coin you bought is shit coin, we are in bear market when many new projects that are shit coin will loss value drastically. If you want to invest in new project it is good to only use small amount of money so when the season of bear market comes their wont be lose much.