Hi Shi Ying, Many companies do require at least a bachelor's degree for interior design position. If you wish to continue to work in this field, you must have at least an Associate Degree. The assocate degree will get you up to as an Design Assistant but you will face a lot of competitions because there are many graduate students out there looking for a job. Meanwhile, if you go for a furinture sales, you still be able to find a job there.
Hope this help and Good Luck.