Yes, you can. Drywall basics aren't really all that complicated or difficult, so you can likely do it yourself, but we recommend that you hire a professional because the DIY job is not likely to be as strong or look as good as a professionally completed drywall project. Drywall finishing in particular is a skill that takes time and experience to master, as it is more art than science. Unfortunately, no matter how good your drywall work is, if the finish isn't done well, the whole job looks bad.