No. Steam only allows trading once Steam Guard has been enabled for 15 consecutive days. To trade on Tradeit, your Steam Guard Mobile Authenticator also needs to have been active for at least 7 consecutive days, your Steam account must be above level 0, and your Steam inventory must be public.
If you see "You are not able to receive trades", see Why does it say "You are not able to receive trades"?. To set up the authenticator, see How to enable the Steam Guard mobile authenticator?