Do future continuous and present continuous(for future use)really have the same meaning?

See this example " I will be going to work from tomorrow onwards, so I won't be coming to the park anymore" vs "I am going to work from tomorrow onwards, so I am not coming to the park anymore'

I've seen present continuous being used in sentences like "I am meeting him tomorrow" "I am going there next week" etc - for planned decisions, so can we use the present continuous tense here? If not then why ? And if yes, then does it mean the exact thing?