Hi Nathaniel,
First things first, Google is your friend. Find useful resources online, there's a lot of useful material on LinkedIn as well. Take courses, depending on what it is, you may be able to find free courses. Find people in the space you're looking for to mentor you. Also remember, a lot of skills are transferrable, so look for ways you can change gears with the skills you have gained previously and use it to ad value to your new career.