If you want to pursue Diploma in Fashion Designing, you can join after class 10.

If you want to do BA or BSc in Fashion Designing, then the minimum eligibility is Pass in 10+2 or 3-year diploma in a specialization from a govt. recognized university. In that case, for Bsc, you must complete +2 from science background, if you are interested to do BA then, any stream will do the good.

I hope this helps you!

If you the technical side i.e B.fetch then you will have to choose science stream i.e Physics, Chemistry, Mathematics/Biology.

But if you want to do B.des then you choose any stream of your choice, be it Art's, Commerce, Science.

After your 12th, you will have to appear for the Entrance exam, NIFT entrance. But there is some much time left for that hence focus on your 9th Class syllabus as of now.

All the best!!