There are a lot of questions that beginners in conjure have beyond just spells, especially when they are trying to transition from store bought condition oils to their own. First let me say: There is nothing wrong with buying oils and products from others especially if the seller is both gifted and competent in making their product. That being said, it's important to make sure to have a few things when you want to produce your own powders.
Don't let your budget stop you from getting started by any means, you can get most ingredients in powdered form from a dollar store. These suggestions are listed as a means to advance yourself.
One of the first things you want to get for yourself is a mortar and pestle. This handy dandy ancient tool will allow you to grind and process your dried herbs into powders. When you go shopping for this try looking in Asian and Indian markets, you will save a bundle than what you might spend at some grocery stores. You don't need a gigantic mortar, but you want one that is big enough to allow you to grind and blend ingredients easily.
Remember, as you beat and grind your herbs to speak your intentions over them. Always speak to the herbs, your words and breath move the spirits and instruct them on how they need to work for you.
When you process your herbs into powder, the finer the powder will generally improve your results. Especially if you plan to use the powder to lay a trick. You want it to be as fine as possible so that when you blow it into the air it virtually disappears. Get a series of sifters that get increasing fine, so that as you process your herbs and dusts they turn into the finest possible powder.
NOTE: some herbs will have a limit as to how fine you can get them by hand*
Some herbs and roots are initially tougher to process. It can be very frustrating if you don't have the right tools for the job. A steel file can make your world make easier. It can let you powder a hard root, gemstones, or even precious metal.
A grain mill is a little bit of an investment but it can save you quite a bit of time when you are trying to initially process your products. A coffee mill is also suitable for this purpose as well, except you won't want to ever process your coffee though it as it can contaminate future use. Whatever you decide to use make sure to clean it thoroughly after each use. It will also save your hands and wrists from hours of processing with the mortar and pestle. Even after you run something through your mill you should still process it in the mortar and pestle.
Again, the above is merely a suggestive list of things that you should have to advance yourself and your conjure. The finer your products and ingredients, the more refined your results will be.