Unless you're going to be looking at the plate carriers with the three integral front mag pouches (like the Crye, BFC, Tyr, and LBT 6094), it may make more sense to first get a small chest rig (enough to carry a few additional magazines, maybe some extra FAK and admin/notetaking supplies, and save towards a plate carrier that will work under it as needed, giving you more flexibility.
A standing recommendation would be one of those plate carriers, some BFG 10-Speed pouches to add room for pistol magazines, hydration, blowout kit, and some admin storage and that's all you'd need.
عندما تصبح الأسلحة محظورة, قد يملكون حظرون عندهم فقط
کله چی سلاح منع شوی دی، یوازي غلوونکۍ یی به درلود
"Being able to do the basics, on demand, takes practice. " - Sinister