Radio Hams will not announce their country often. It is in their Call Letters(Call signs). A call sign has a prefix and suffix. i.e VU2JOS Jose Jacob's call, the prefix is VU2 and in there is the country code VU-India and JOS is his personal part- the suffix. I am 4S7VK- 4S=Sri Lanka. Download a list of country prefixes and you are in business. Like the WRTH there is a Call Book or on the net a site QRZ.Com. When you go to it there is a small window to type in the call sign and then hit enter- then that hams details will pop up. Just try it.
Radio Hams use nothing more than a 1 kW or 2 maximum. Usually the average common power is about 100 watts which is equal to about 100kW in the Broadcasting field. So the telescopic whip might not get you more than a few signals. Adding a wire outside helps, but a dipole for the particular band even 15 feet off the ground makes a huge difference. For receiving you don't have to match it unlike for transmitting. The internet will give you dimensions, designs etc.
QSL cards-almost every ham has a QSL card and most will send you a QSL card if you send a reception report. Usually you might send an IRC or self addressed envelope with some return postage. Local hams will be happy to send his/her card, just enclose a SASE as a mark of respect.
Best time to listen is in the morning on 7 MHz and evenings on 7, 14 and 21 MHz. Sri Lankan hams use 7060 between 7.30 a.m. and 8.15 a.m. There is an Indian net on 7080 starting at 7.00 a.m. Anyway just tune around and you will get the hang of it.
When two or three hams talk they will use their call signs and of course address them by a short name, the first name usually. The one who is about to turn over (as he finishes talking,) to the other, will first give the call of the person who is going to pick up and the person just finishing will give his callsign last. i.e I will say VU2JOS to take it and my call sign 4S7VK. When Jose picks up the microphone from me, he will say Roger 4S7VK, VU2JOS returning.. or something like that. Just try it and sooner than later you will get the hang of it.
73 Good luck with SWLing the Radio Amateurs. de 4S7VK.