The sun is in a different direction than Mars though. Both require escaping Earth orbit and and entering solar orbit. From there, to get to Mars you need to raise your orbit relative to the Earth. To get to the sun you need to lower your orbit relative to the earth.
Maybe Branson or whoever can provide all the extra rocket power he needs or something.
Let's just get him there. Also he can visit Mars first and then adjust trajectory. Or maybe some nice people can help him do that since he'll be too distracted shitposting on his platform until he's crispy.