Hello Saloni,
If you want to join Interior designing or Fashion designing there is no need to choose streams. You can directly join in Professional Diploma or Master Diploma in Interior or Fashion Designing, once you complete your 10th standard. OR even you can pursue B.Sc in Interior designing or Fashion courses, after completing 12th in any stream.
Also apart from that there are many Certification courses from Private institutes but this may cost you a bit.
After completing anyone of these courses you will get a very good job in some companies.
Good luck
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