You need an authenticated NBI clearance from DFA, if your a local hire in Qatar. You need the local Qatar Police clearance from CID for that purpose not the one from there. Also you need to translate the NBI in arabic once your here in Doha. Also all you educational certificates to be authenticated. It will be a big hurdle for you if not. Our embassy here will not authenticate your documents if not done first there. Especially NBI. Also better deal with a manpower agency so that you are a documented OFW and no more worries of the above details.