Burning leaves...burning leaves...why ever would burning leaves smell like burning leaves? Maybe because they're burning leaves?
I have some disappointing news for you. Tobacco is made from leaves. When you set fire to it, those leaves are burning and are apt to taste like burning leaves. The flavor of those burning leaves may vary some depending upon which combination of leaf is burning and what flavorings have been added to it. It's not uncommon for the scent of the burning leaves to be better than the taste, especially at the beginning of pipe smoking.
Some things that you can do to improve the flavors are to dry your tobacco until it's almost crispy crumbly dry, as the excess moisture masks the flavors of the burning tobacco, pack lightly at first and experiment with the pack until you find something that works for you. The draw on a pipe should feel open when packed and never tight. Last, smoke slowly. You puff to get the tobacco lit at the beginning, and then gently sip. When the tobacco is barely smouldering, that's when the "burning leaves" flavor really dissipates, and the flavors that you're tasting become more like the flavors that you're smelling. It takes practice.
About that ashtray smell. More disappointing news. There are ashes from the burning leaves deposited around the sides of the chamber. Ashes smell. They never not smell. You can use a wadded piece of paper toweling or some pipe cleaners to wipe the walls of the chamber after dumping out the ash, but some smell will always be there. You could spray the pipe with Fabreze to kill off the smell, but chances are that it would fail to get rid of the smell and the chemical remnants would probably kill you the next time you burned some more leaves. So it's probably not a good idea to spray the pipe with Fabreze. Best to clean your pipe with pipe cleaners, paper toweling, and warm water for the plastic stem, and to just embrace the remaining stink.
You can look at videos on YouTube. Just do so with some skepticism. There are a few excellent videos. The vast majority are utter crap. It's YouTube. Any moron can put up a video, and most of them do.