When on H-4, you CANNOT work period. It doesn’t matter whether the work is online, offline or a company not registered in US. You just cannot work.
In order to work, you need a company to file H-1 for you. Once approved, you can work on H-1. Or get H-4 EAD for which your spouse needs to have an approved I-140 or be in 7th year of H-1.
Only an employer can apply H-1 for you. You need to find an employer, and if they plan to hire you, then they can file H-1 for you. There is no self-filing.
Like you said “no work, means no work!!”. Is your spouse close to getting his/her I-140 filed or entering 7th year on H-1? If yes, then H-4 EAD is an option which would then allow you to work.