Hi Guys,
I need advice on the following categories option which is good for SEO Option 1 or Option 2

Option 1:
Learn English [ main category]
Learn English grammar [ main category]
Learn English Vocabulary [ main category]
Learn English tenses [ main category]

Option 2:
Learn English [ main category]
Learn English grammar [ sub category - under Learn English]
Learn English Vocabulary [ sub category - under Learn English]
Learn English tenses [ sub category - under Learn English]

Which option is good for SEO in a long run.

Please help me to structure my site.

Much Appreciated your time and responses.

Best Regards,
NJ