two minds about sth

of two minds (about something){BrE}
also
in two minds (about something) {AmE}
(to be unable to make a decision; to have difficulty making a decision)
сомневаться, колебаться

.....I'm in two minds about accepting his offer.(CALD)
..... I was of two minds about whether to invite him to the wedding. (CACD)

[sit on the fence]