What should I do/say to the interview?

Hi! I’m working as a VA with an agency here in PH. Pero I found a job posting online few weeks ago and I’ll be doing the exact same work, just with direct client, siyempre mas mataas yung salary and all.

The problem is, I don’t want to resign sa current job ko since it’s more stable (?) I suppose.

What can I say sa interview pag tinanong if working pa ako? And may need ba government document before makapagwork sa kay direct client? Pinoproblema ko ‘to talaga baka magkaproblema sa tax and all that shii.

I know I sound greedy, pero gusto ko naman umangat sa buhay hindi yung living paycheck to paycheck.