◇ Could this help me?
Yes for the research, no for the booking. Comparing flights across sites is genuinely tedious work with a clear right answer at the end, and handing an assistant a standing set of preferences so it can assemble and explain the price against total travel time is a good use of a connector and a project. The part to change is the framing that it books your flights: an agent operating a signed-in browser that may hold saved payment methods should not be the thing that completes a purchase, and the fact that it paused for approval once is not a guarantee it will next time, so keep the payment step with a person and confirm the fare with the airline directly before paying. General practice.
Act as a travel researcher for a trip I am planning. My home airport and travel preferences are below. Search and compare options across airlines and booking sites, then give me a shortlist with the trade-off made explicit for each: total price, total travel time including layovers, and anything that would cost extra later such as baggage or seat selection. Show me the exact fare and booking link for each option so I can verify it myself. Do not attempt to book anything or enter any payment information. Stop at the shortlist and let me make the booking.