Find an angel investor to start with. An ICO is (unfortunately) not a fundraiser, per-se.

Google (marijuana cryptocurrency), a few people have launched coins look at how they did it. Maybe work with one of them.

Learn how to write and implement a smart contract. Decide what your coin will be worth (initially) and what (if anything) it will be backed by. Describe why someone will want to hold or buy your coin.

Consider incorporating in a State or country where all hemp based products are legal (there are several), raise money there.

Take donations in Bitcoin or other Alt-Coin. Offer incentives for donors.

Be VERY CAREFUL if you are in the US. While your products may be legal in your jurisdiction they may not be legal federally. If you raise money using cryptocurrency for an activity the country considers illegal you can go to prison for money laundering