Draft inducer on the furnace itself or the main blower motor in the air handler? Replacing the main blower might be more involved but the draft inducer is definitely right there in the DIY realm. In fact, I think that both are quite doable for a homeowner armed with some basic knowledge about electrical motors and common mechanical skills.
So, by all means, go for it! And be careful and shut down the power before opening the furnace. Draft inducer is a small motor but 120V shock is no small matter for your health.