Is it permissible for me to follow a man on instagram who sent me a marriage proposal just to learn more about his beliefs and interests by seeing whom he follows? Would that be sinful? (No private messaging)

I'm not in favor of this, and I say close the door altogether. Because what if the marriage proposal didn't work out? You might keep on checking his profile or even send him a message in the future. So we say close the door altogether. Barakallah feekum.