How big a farm do you have? A lot here depends on scale. While mostly this is a matter of applying for registration for certification, reading up all the regulations, and of course being sure that you can sustain the crops you plan to grow on your soil with no soil amendments (fertilizers).
Before you go to organic, you will want to be fairly weed free.
But the big cost can be reduced farm output for 3 or more years. There will be reduced input costs, but outputs will fall more, and you will not be able to sell at elevated organic prices.
An organic farm often has more hand labour to control pests, and this is true in the first 3 years. If this has to be labour you hire, this is part of your capital cost... well, you can expense it, but it is capital cost if you are honest.
You may be unable to sell some of your wormy produce because buyers of conventional farm produce expect perfection. (Organic buyers insist on a few worms).