are you sure ? i sometimes find science to be one of the most transferable degree out there as compared to say, medicine, accounting or dentistry.

i'm a science degree graduate myself but currently doing UX/UI because of my passion for design. but if you can, just start to find a job with a stable income first while you sort out your business plan. if you hate working for people like myself, you can start freelancing. save up some money and start your own business venture (would be great if you can do it with a like-minded mate). start slow and steady and work your way up. don't do things hastily.