Anavar will give you mild muscle growth, but get you really hard and lean.. it is a perfect pre-contest drug. I personally have not had a rebound from var, but like with everything else, your body does not stay rock hard off like when you are on, so in that sense, that was the only "rebound" i experienced.
If you have a clean diet, you will NOT gain fat, but just some really nice lean mass and you will lean out for sure! You can not really bulk up on var unless your diet is off the hook in calories.. but that goes for anything. There is no such thing as soft when using var

that is why i love it so much!!!
Pre-contest i would start about 12 weeks out if not sooner. You can run it right through your show too.. holds little to no water.
hope that helps

and do yourself a favor too and run a search on anavar to pull up all the past posts on the topic!! It can only help

welcome aboard and good to have you!
luv super