Whatever you do, before you even start trading skins etc.. make sure your profile doesn't have ANY vac bans or any sort of ban, that will decrease your chances a lot of a successful trade. Gambling websites is the only way nowadays to actually earn profit off skins though, and if you're in UK then... most of the websites are banned lol so it's 10x harder. My tip is just to gamble on ton of gambling websites that aren't actually a scam and make sure you have a good looking profile with an alright level, around 15 or higher to make you more legit.