Firstly you need to give some more details of the nature of the fracture
- location, extent, etc.
Also, I strongly recommend to undergo physiotherapy
before you start walking.
You can put weight on your good leg and walk with crutches. Also, since its been 3 months since your fracture, you can do partial weight bearing (just bear 25% of body weight on you affected leg) on your toe and walk slowly. Do some ankle toe movements and consult a physiotherapist for isometric exercises before you immediately just bear complete weight on your leg.
Take care, Get well soon!