Start with a modest goal and do some research on the tools you would need to build it. Assess the space you have available and adjust your goal and/or your tool selection accordingly. Go find those tools second-hand (Craigslist, etc.). I think just about every power tool you would need for furniture making will require calibration so learn how to do it properly and actually take the time to do it. Eye protection, a respirator, and probably hearing protection are a must. Share your work on here!