1. Heyoo. Start by turning off the phone with a Power button.
2. Now hold down the Volume Up and, still holding it, press and hold Power.
3. Phone's logo should pop on-screen. After it does, press Home button.
4. Voila! You are now in Recovery Mode. If you aren't, it means something went terribly wrong and you need to start again.
5. Navigate Recovery Mode menu using Volume buttons to scroll between the options and Home button to select them.