This is probably a duplicate, but:
Seller’s broker is usually the starting point; they deal with the mechanics of publicizing it, and they can advise you on how to go through the rest of the process.
You will need a real estate attorney when you have accepted an offer and are finalizing the terms of sale. In my case I paid mine for some extra time to help me actually understand some of the more obscure parts of the contract; I try not to sign anything until I’m sure I know what I’m signing.
Appraiser is usually hired by the buyer. You can have an appraisal done but the buyer’s unlikely to trust your appraiser’s opinion so that’s probably wasted effort. The appraisal that matters is what the potential buyers think it’s worth.
Profitable: The agent will help you try to get the best price for it that you can, within the time limits that make sense for you, as soon as you can. How much profit there will be depends on the mood of the market. Remember that until you do sell, you are still paying taxes (and whatever maintenance may be required) on the property, so there is some cost to waiting too.
There are many books on selling and buying property. They tend to focus more on houses than land, but it’s not a bad idea to check a few out from your local library and give ’em a quick read through to better understand the process.
Good luck.
