Signup as a client, post a job your are looking for choose your Trade, Budget, Time scale and then post, Local Tradesman in your area will see this and bid

When posting a job you will see a Post Job button in top of task bar, following the instruction on the main screen then post your job easy as that

If you are looking to change your job or updating changes then go back to the job and edit, making sure you save changes and the tradesman will get a update

When choosing a tradesman try to get 3 quote before accepting, then you can also look at the work and rating before you decide to provide them the work

Once your job as been completed by your tradesman then you can accept all as been completed and leave a rating for Him or Her