Advice for a long time DM playing a game for the first time in a couple years?

[MonkeySage]

I'm playing an assassin, lawful neutral or not. While my character is motivated by a cause, not by greed or compulsion, i still don't want his role to be disruptive to the group. I'd much rather *include* the party, and I've no desire to inconvenience them. My hope is that the character is suited to the campaign. There's no shortage of potential targets in Numeria, since a criminal organization of has gained a lot of power in the country, and may even be the ones truly responsible for burning down his home. They even have the ruler of Numeria eating out of the palms of their hands.

I'm wanting to avoid being disruptive.