Hey Deepak sharma,

Yes you can apply for digital marketing courses after your completion of +2. There are two types of courses they are certification courses and diploma courses. As you are pursuing intermediate you are elgible for Certificate courses. Many online platforms provides this course few of them are,

1. Google digital Unlocked Program

2. Digital Vidya

3. NIIT

4. Google Primer

5. Udacity

6. Udemy

7. AIMA

8. Edupristine