Here are some tips that’ll help
Parking ( if you have a 2 wheeler) : There is a space that is on the right side of highland coffee – 20k if I’m not wrong
Once you are inside the post office – Step 1 : find the post cards on the left. They have some fancy vintage looking ones as well – Step 2: Write on your post cards with a To, From and message. Be vary that you might have to stick around 3 stamps ( India, USA, UK) – Step 3: Go to the lady in counter 3 and get your stamps from her. Tell her the country you are sending to and she’ll give you the right stamps ( trust the process ?) -Step 4: Once you are done with the sticking there will be some blue trays that you can use to drop the post cards
Congratulations you post cards will now reach you near and dear ones
Bonus tip: There is a street on the right side where you can get a lot of memorabilia and it’s pretty nice. I’ll add some pictures of what I got