The God wants me to serve him

On last Thursday I received a telephone call from the Friday Charismatic prayer group leader informing me that I was selected to serve in the Media Ministry within the Prayer Group & asking me whether I accept the role. Without thinking twice and also not knowing what exactly I have to do in the role, I said 'yes' and that I'm grateful that the Lord has chosen me to serve him, even though am not sure whether I'm spiritually the right person. All what I know at this stage is that Media Ministry has two members - that's my self and another lady from the Prayer Group.
Over the weekend I had also received an email from the Prayer Group requesting all those who are serving in various ministries to attend a meeting at the Church in the presence of the parish priest to elect the 'Core Team' - the 4 member executive team who would mainly be leading the Prayer Group, supported by the various ministry members for next two years, For the last several years that I've been going to Prayer Meetings in the church, I never have neither served in any ministries nor attended any formal church meetings. So I'm a bit anxious as to how the proceedings are going to be at the upcoming meeting on this coming Wednesday, particularly because though I have accepted the Lord Jesus Christ as my Lord & Savior a few years back; I haven't still been baptised and partaking in holy communion during holy mass. So I don't know, under these circumstances, whether I am still qualified to serve the Lord in the Prayer Group ministry. Perhaps, I will find out during the meeting on Wednesday…