The purpose of the Lector is to proclaim the Word of God effectively.  This does not demand professional training.  More important is the willingness to attend mass reliably and prepare for the readings conscientiously.  Assistance is available for those who seek to improve their speaking skills.
You are encouraged to consider becoming a Lector.  It is a good way to meet a number of your fellow parishioners, to become involved in the community, and is a concrete way to exercise your baptismal commitment to proclaim the Word.