Be very warned about whomever you would want to trade as not all people who comes here are actually wanting to help you, some could just pretend and asked you to send first and immediately you do that they wouldn't mind blocked you direct without having to contact them anymore.
That's true. There are plenty of scammers here. If someone asks you to send the coins first without having a good reputation or being well-known on the forum, there's a high chance they're a scammer, especially if they're a Newbie or an account that was registered recently.
Yeah I noticed they already tried to scam me, they wanted to send me some USDT and then they asked me to pay a „release fee” , but im not born yesterday, I usually deal that I get first the crypto and then I pay, or with some p2p platform or escrow
You're also a Newbie and don't have enough reputation on the forum for people to trust you and send the money first. Also, you claimed that you found a wallet with those funds. You were asked to sign a message from the wallet, but you still haven't provided any evidence that you own it or have access to those funds.
A safer option is to use a trusted P2P platform or one of the forum's escrow services for the trade. Otherwise, I don't think this trade would be safe for either party.