Rug burner
is what happens when you clean it out and drop a bit of hot ash on the rug, so your description isn't wrong!
Chamomile tea is made from the dried flowers, commercially they just grind them up first to put them into teabags presumably as that makes it easier to portion up exactly per bag, but it's fine and much more natural to use the whole dried flowers in a pot.
Usual advice is not more than 3 cups per day as it can cause constipation.
A very old friend who grew up in Germany where dried herbs are sold in their markets specifically for self-medicating said the dosage everyone there uses is
One cup three times a day for an adult,
One third of a cup three times a day for a child
I have absolutely no idea if that's still current practise.
Tea-strength, cooled, it makes a lovely rinse for naturally blonde hair and will enhance the highlights. It can also help with an itchy scalp.
One mug of three times tea strength with half a teaspoon of bicarb will make an antiseptic soak, it may stain the skin brown. It worked well with a deep cut on the foot for one of my family.
Try growing some strongly flavoured mint in a pot on your windowsill, the varieties with the red stems are good, then you have a source of fresh mint-leaves for mint tea. The vibrant colour when the hot water hits the fresh leaves is amazing every time.
At the first sign of spring, I collect the fresh nettle tops from the garden and make tea with them. If there are enough, I use them as a veg and pop them in soups. They are a real spring tonic.
Don't collect any on farmland or public land where they may have been sprayed as a 'weed'
Don't use the larger leaves, they are toxic unless boiled for a good 10 minutes.
Enjoy your individual journey into all things new, some you will resonate with, some you will think 'not for me' that's exactly the way it should be.