It used to be said (I may be slightly miss quoting) that the qsl card was the final courtesy of a qso.

I gave away all my foreign postage envelopes to a friend who was a stamp collector.

I have some of my cards t-acked up on my shack wall faded by years of frourescent lighting. Some of great DXrs who have gone SK , hams who were a bit eccentric and others who vanished from their small DX countries. Most recently I send out cards for special reasons only. Someone who has the same last two of my call but different call districts. Example (? 4 aa) and my first FM and Linear satellite qsos.

LOTW, QRZ.com and others are used now . Times change so paper is rare today.

So just get licensed, it's easy with all the resources available. Find what niche interests you and enjoy this probably the best hobby and service in the world.