If you accelerate to a very high orbit, you will have nearly zero velocity at the apoapsis. From there it takes only a very small delta v to reduce your velocity to zero and fall into the sun.

Source: This is how I killed Jebidiah Kerman.

I use the right hand rule

https://en.wikipedia.org/wiki/File:Right-hand_grip_rule.svg

Point your right thumb in the direction you want the screw to go, and your fingers will curl in the direction you need to spin it.