Well, you did the first step and backed-up your files on the Time Machine. Before, you proceed, I would suggest that you check the compatibility of your 3rd party Apps with Roaring Apps. Any application not compatible with Mavricks could cause problems. http:/roaringapps.com/
My next step would be to google search your "MBPro model and Mavericks", and read about any problems people had after installing Mavericks.
If you want to proceed, get an 8g USB drive to save Mavericks and creat a bootable drive http:/lifehacker.com/how-to-create-an-os-x-mavericks-usb-installation-drive-1450 280026
Download Mavericks. Do a clean install; not an upgrade. Bring in only the Apps that are compatible with Mavericks.