I have found that it is easier to get students to switch from flute to bassoon than saxophone or clarinet to bassoon. This is for three reasons:
1) The bassoon embouchure is radically different than the flute or single reed embouchure. But since the experience of a reed in the mouth is so strange for a flutist, these students more readily adapt. The single reed students try to keep their same embouchures and consequently the jaw is too tightly held and too closed.
2) The bassoon oral cavity is also very different than flute or the single reeds. Here again the flutists seem to be less likely to impose their flute tongue or throat positions on bassoon playing. Again this is a problem with single reed players, especially more advanced players who have learned "voicing."
3) Increases or decreases in air respond the same way for double reeds and flutes. When they increase air the pitch goes up. This is not the case for single reeds, increases in air cause the pitch to go down. Again the single reed players need to fight againsts acquired skills.
This does not mean that single reed players can't make fine bassoonists. It is just that learned habits that are very good and successful on the clarinet or saxophone are poor habits on the bassoon. Flute players don't seem to bring these same assumptions to playing the bassoon.
Good luck. I think your choice of bassoon is excellent!
Professor Bassoon, Towson University
Former President, IDRS
Former Principal Bassoon Hong Kong Philharmonic, Wheeling Symphony