• Yes of course you can do or get a job in fashion styling after doing diploma in fashion , as you have experience and certification in this respective field , the diploma courses varies in time period if you have joined for diploma course it would be 2 years after 12 th grade or after graduation diploma courses are usually 1 year course , If you have completed courses from national institutions like IIFD (India Institute For Fashion & Design ) can have a very good impact on your resume
• You can also enter into the field of fashion styling if you have degree or diploma in fashion merchandising , fashion retailing or fashion management
• To become a fashion stylist for premium companies and celebrities you can do masters in  fashion styling to increase your chance of selection

MAJOR ROLE OF FASHION STYLIST

Design beauticians work for people, style houses and dress brands. Their primary obligations incorporate giving design guidance; picking and co-ordinating outfits for models in photograph shoots or entertainers in TV and film; and picking props and adornments and setting them up for shoots.

BEST COUNTRIES FOR FASHION DESIGNERS / STYLIST ( To build your career )

• UK ( heart of fashion world )
• US ( good choice for fashion students )
• France
• ITALY
• SPAIN

Hope this clarifies all your doubts

best wishes for your future