1) Especially is an adverb which usually means “particularly.” (If you need an adjective, use “special” instead.)

I felt especially after the party. (WRONG!)

I felt special after the party. (CORRECT)

2) You cannot start a sentence with especially.

Especially I like chocolate. (WRONG!)

I especially like chocolate. (CORRECT)

3) Especially is often used to introduce an example (don’t forget the commas).

Many Asian students, especially Koreans, study English.

I like superhero movies, especially “Spiderman” and “Batman.”

I’ll post on the proper use of “specially” in the next day or two.