Hi Garry and
along. Get Stellarium ( FREE! ) on your PC. Best way to learn and locate objects both before and after a session. And brilliant if the clouds are preventing real session outside
You should be pretty good with your scope being acclimatised in the garage although it will still need a little time to cool down to local ambient and stabilise. It is not critical with a 10" f5 but you will find the views may improve later on as it reaches that point.
Don't panic about buying everything straight away. a few decent EPs, a decent finder and/or RDF and some targets and charts will keep you busy for the first few sessions anyway. Dobs are easy to use and quite amazing what they will show you when big enough. 10" is an excellent start point, go and there and explore.