Start with a semi inletted stock. Easy to send your to have it turned. The time saving will be major and it will get you started in the right direction. Your gun is not the worst one to start with but is is much harder than most. A semi inletted stock will eliminate most of the layout problems and give you a decent chance of success.

Go slow, use only extremely sharp tools, never work when you are tired, make your blank easy to work on by using a vise to hold it while working, use good light to see what you are doing. Dull tools cut poorly and tend to get away from you. Go slow as you get only one chance to remove wood and if you take too much your will never stop looking at the flaw. Never work when you are tired because that is when you screw up the worst. Find a firm and safe way to hold your wood so you can control your cuts. It is impossible to do a decent job any other way. If you want to try inletting the scolloped areas try a scrap wood block first. See how hard it is to get all those areas to come to geather well and learn how to mark the metal and read the marks on the wood.