Reinforced bending helps but it can make vibrato more difficult for a beginner. I find that if you bend a string down (towards the ground), the pad of your finger should touch and mute the lower string (the heel of your right palm simultaneously mutes the upper strings), as you release the bend, the heel of your right hand should mute the lower strings and if needed shift over to dampen the upper strings... Hard to explain but you will probably get your own technique in time.
Try turning the lights off and sitting in a dark room. If you can't see the fretboard you will rely on your sense of touch and your ear. Just keep bending the same note over and over, then try working up and down the fretboard, your ear should tell you what to adjust. I find that my playing is a lot more expressive if I play in the dark or with my eyes closed, it also helps with your articulation and knowledge of the fretboard.