The amount of experience you need depends on how deep into doing it you wanna go. The community makes and sells kits and components and there's facebook groups and discords that help answer questions and troubleshoot problems.

You can definitely source components that require no soldering and no 3d design skills and build your own board without pre-existing experience. Sourcing those components may take time since a lot of the best ones have a lot of demand and can't really scale.

The ride I went on yesterday in SF had six riders on vesc boards, two of which the the Floatwheel which is starting to be made at scale by a member of the community in China and sold via cryptocurrency since Future Motion has successfully blocked his ability to accept credit cards.