I tried 'On my part, I agree', which is what I would say in english, although it isn't a direct translation.
"I'm alright" would be closer to je vais bien. The given sentence is "Pour ma part, je suis d'accord. " d'accord here means "agree".
While it is true that, as an interjection, D'accord can mean "OK" or "All right", the latter does not apply in this context.
"On my part" still not accepted, which is the most natural translation in English.