I think going last is considerate of you. But be aware that father may feel somewhat weary by then also, so you still may not get as much time as you feel you need.
Just be prepared and let father lead you. If he moves the confession along, be prepared for that and go with him. Start with the sins that trouble you most, so you will get them heard, and move on to the lesser sins, so that if father cuts you off, you will know that you covered the important issues.
Most importantly, especially for someone who is scrupulous, you must trust your confessor. Even if he seems to cut you off and absolves you before you feel like you said all you wanted to, you must trust that the absolution is valid and all your sins are forgiven.
If for any reason the process leaves you with questions, make a separate appointment with father to discuss, especially if scrupulosity becomes and issue. For scrupulous people, you need to find a regular confessor, one who you trust, and one who you will obey.
But have no fear. It is a wonderul sacrament and I hope you find the mercy and love that it is indended to provide.