Here are somethings I can think of right off the bat:
I would ask "how are you going to market my home"? What are all the different ways and in what avenues are you going to market it? Magazines, newspapers, internet etc. Be specific. What magazines, newspapers and websites?
How long is your contract going to be with this agent, some are 3 months, 6 months and so on. Read it well.
What is the commission and the split going to be? And how is it going to be split with the buyers agent?
Will you call me and update me weekly or how often?
Are you in Texas or NC? I know where I live in Texas we have mineral rights. Get that written up, if you do have them with your home. Are you keeping the mineral rights if you have them? Stuff like that.
Ask a lot of questions because this is your first time selling.
Good luck and I hope your home sells quickly!!!