My girlfriend and I are also not extroverts… in fact, I’m what you might call an outright introvert. There are talents and skills that we have though, that can be valuable to the Church. We try to use these gifts and abilities, in our own small way, to help.
We both attend university and there are organizations and groups that are deticated to the task of evangelization in a campus environment. Something that I’ve found hard, but very rewarding, is getting involved in these groups and just being there - armed with as much knowledge that we can gain by studying Church documents, the scriptures, and through prayer - and being prepared to act as a stabilizing element in the often enthusiastic, but sometimes not doctrinally sound deliberations within these groups. By humbly submitting truth, and referencing it well so there’s no confusion over what is opinion and what is Church teaching, we are able to help the group in a small way stay faithful to Christ in the spiritual development of the young people of the local universities.
Another thing that I have found, is that there are usually things that need to be done, but aren’t noticed by most people. Some of these things I am capable of doing. Some of them I can only help bring attention to. For example, there is a need in our area for an expansion of the university ministry facilities. It was very apparent to me, and to a few others, that something needed to be done, as the present facilites are cramped. I went to one of the priests who is the chaplain for the largest university in our area, and discussed this with him (a wonderful priest by the way… young, enthusiastic, and orthodox). He agreed that an effort should be made toward improving the facilities, and he brought it up with the bishop a short time afterward. Now, I am looking into the possiblity of expansion on existing property and am in the beginning stages of developing a proposal for a plan of action (including preliminary designs, cost estimates, restrictions placed on expansion by building codes, etc.). It isn’t something flashy, or something that people will recognize me for, which suits me just fine… I like to stay out of the limelight (I’m setting it up so that the priest gets the credit… something he’s not aware of yet. ;)).
Perhaps there is something that you can do for your parish, or diocese even, that utilizes your special talents, and doesn’t grate on your introverted personality. If you find something, don’t be afraid to ask your priest, or your bishop, whether you can help in that specific area.
Something that I would do, before you get involved in anything, especially anything to do with liturgy or catechesis, is study. By knowing the Faith better, we are better able to see what is needed, and better able to act when necessary.
God bless, hope your journey goes well,