Head coach Andy Farrell named Doris to the role prior to the Autumn Nations Series, and she has been tipped to lead the British and Irish Lions on their three-Test tour against the Wallabies next summer.
Following a heartbreaking loss to New Zealand at the beginning of November, the hosts barely defeated Joe Schmidt's team on Saturday to add wins over Argentina and Fiji. The 26-year-old scored the second of Ireland's three tries and was awarded man of the match.
"From an individual point of view, the more opportunities you get to do it, the more comfortable you become with the extra responsibilities," stated Doris.
"Over the past few weeks, I think there has been some progress there. I'm confident that I'll keep developing if I had the opportunity to do it again. I have faith in that.
Doris, the World Player of the Year nominee who took Peter O'Mahony's position as captain and seems to be the long-term replacement for the retiring Johnny Sexton, believes Ireland can look back on an uneven autumn as a victory.
Doris, who filled in replacing O'Mahony as captain during victories over South Africa and Italy earlier this year, stated, "I think so, I think there's been growth from the first week."
"At first, the message was that we needed to see progress and continue to change. We must improve, just as other teams are.
"The message has been that all along.
Ireland's defence of the Guinness Six Nations title and the ensuing summer tour in 2025 will be led by defence coach Simon Easterby.