Attachment is below. Trying to revolve this sketch about the x axis. No idea how to. The option for Revolve boss base does not come up.
You have at least two problems. First, you have made this as a 3D sketch and it needs to be a 2D sketch. You will have to recreate it as a 2D sketch. To help with that, try selecting all the geometry in the 3D sketch and using copy (Ctrl+C) and then create a new 2D sketch, select the front plane, and paste the geometry there (Ctrl+V). Then you can position it and dimension it and delete the original 3D sketch. Then a second problem I see is that this is not a single closed contour. You have at least one extra solid line going down the center of the part. You need to either delete that or convert it to construction geometry.
While you do not need to convert your 3D sketch to 2D, you do need to fix the profile.
Make only half a sketch (delete the little lines I have highlighted
Create another 3D sketch of a circle perpendicular to the first sketch.
Now add a sweep feature
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