“Space is big. You just won’t believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.”

You need multitudes more energy to get to a sun orbit than you need to leave the solar system.

https://space.stackexchange.com/questions/55201/orbital-mechanics-and-launching-into-the-sun