Pray, and read your Bible, talk to God, and let Got give you the message of the hour, study, go over in your head. Preach like it will be the last sermon the people will ever hear. Every style is different. Do you feel called to be in the ministry, if so that is a good calling.
i know how u feel then.... i am also called to preach and ive preached about 7 times now...at first it will prolly seem impossible to create a message...but as u do it more it will becoe easier....just pray and fast alot and also talk with your pastor..
idk like i feel called to be a minister of some sort, but when i try to put someting together i get frustrated and i get ideas but then i just cant get it to flow