mu morek wage da ? wada karanna katha karanwa. professional na wage dala tiyena widihata
contacts mokuth na. email ekath gmail walin hadapu ekak
I am not an expert on online shit, but here is some advice
You are safe as long as you don't share your personal details (which can be used to impersonate/scam you) or your intellectual property (share your designs which he/they will use without paying you)
You are safe as long as you don't give them money without a valid reason (say for your work)
So keeping in mind the above two, see where this goes.
If you work with companies, then they need to have a valid domain. I don't think they will work with gmail. But if it is an individual Gmail makes sense. Also check the gmail ID. Does it look suspicious (random name)?