Hi lee - some of the easiest ways to start are to first try to divide your object into a couple of different logical components, and then start to sketch some of the profile curves for those components.
So for example with your shape one good division would be to try and handle the canopy type area and the body as 2 separate shapes and focus only on modeling just one of those at a time.
So if you just ignore the canopy/cockpit part of the shape for a moment, you could sketch an outline of the body something like this in the top view:
It is easiest to draw just half of that shape and then use the Transform/Mirror command to make a mirrored duplicate. Make sure the endpoints of the half that you draw are snapped directly on to the axis line so that the mirrored result will be symmetrical about that axis line.
Then go to one of the side views and sketch this additional profile:
These are how they are arranged in relation to one another in 3D:
Now select the top-view profile, and run Construct / Extrude to punch it out into a solid, like this:
Now you can select that solid, and run Construct / Boolean / Difference to cut it with the other profile:
This has now divided the solid into 2 pieces, you can select and delete the top piece.
Then it is possible to select these edges:
And run the Construct / Fillet command to round them off so they aren't quite so severe:
That's one of the easiest approaches to building a shape - doing it only by 2d profiles like this will tend to make a somewhat blocky result, but that actually fits pretty well with your shape in this case.
Then to do the cockpit part, one idea would be to draw a top and side profile for that, and then use the Construct / Revolve / Rail revolve command - it can build a kind of revolved dome type shape that matches a profile curve.
Hopefully the above will give you a method to get started though, let me know if you get stuck on any part or if you need more help building the second part after you have made some progress on the body.
Definitely try to break things down into pieces though, it is easier to get started when you focus on a more simple piece of a model at a time.
- Michael