Re: Istikhara meaning
It’s not easy to interpret dreams, but I can tell you that wearing white has positive meanings.
Try www.mysislamicdream.com and Khwabon Ki Tabeer in Urdu Khawab aur un ki tabir islamic dream
these sites have alot of dream interpreatations 
No matter what you do, DO ASK some imam for the meaning anyway, because noone else can really tell what a dream means.