Sure, if they have the time and interest. Sometimes larger clubs delegate these jobs and have several project leaders to meet all the interests of the 4-H members. Who are teen and junior leaders. Junior or teen leaders are older 4-H members who have the emotional maturity and leadership ability necessary to function as a leader. That depends on the size of the club and how old the members are.
Many clubs have an organizational leader and several project and activity leaders.
Your primary source for help would be the Cooperative Extension Office in your county. The office secretary, Extension agent, and other staff can help you. To prepare you for your responsibilities as a 4-H volunteer, you will be invited to special training meetings. Your name will be put on a 4-H leaders' mailing list to receive a newsletter. You will receive materials you need to organize a 4-H club and help you with your job.