tried it wuth petrolium jelly but still nothing,think its a faulty pump

i pulled the sump off and the oil pump drive is on the right spot on the cam , and i am using an mech. oil pressure gauge.
if i am to submerge the whole pick up in oil up to where it bolted on to block and fill the pump with oil can that work? but can i turn the engin with the sump off

The sump and pick up is the ones that came off there

I need help, i just put together an a15 motor but cant seem to get the oil pressure going. i fitted n new oil pump every thing else is new/reworked. i filled the oil filter and the pump with oil , i also fitted the old pump that was working but still nothing
Help please