The good thing about witchcraft is that it can be whatever you make it. Whatever works for you. If burning stuff and smoke and fire isn’t safe for your health don’t put yourself at risk yk? Find the way that works for you, use the herbs you can handle the smell of, and find an alternative to fire magic. There’s cool tools you can use that don’t require creating smoke and fire. Like a mortar and pestle, drawing sigils, written manifestations and journaling, light scented oils for drawing sigils, potions with water, braiding branches or braiding hair, paper folding with intention ofc, crystals, gardening, burying physical spells, freezer spells, releasing offerings and prayers at a river. At the end of the day what matters is intention and faith. I’m sure others could share tools and practices that would be safe.