You are great! I would never to renovate something such by myself! To tell the truth, for me it is much more easier to work and day and pay someone for this job than to lose time, nerves and do it by yourself. More than all I know that I wouldn't be pleased with my final work. I even had ordered a new Makita orbit sander https://www.bestorbitalsander.com/orbital-sanders/makita/bo5031-2-random-orbital-sander/ when we started the reparation works in our new house. Indeed, it is perfect. But frankly speaking, I thought that I can do all by myself. Unfortunately the reality was that I needed a big experience, the whole day to work, and as conclusion someone redone it after me anyway.