Hello 4Given
The Bible doesn't order us any kind of fasting, Jesus has fasting 40 days, the Old Testament also told about many kinds of fasting, all were written for teach us.
Now the reason of fasting is to achieve a quiet time with God or like you said: "... a closer walk with God,a stronger relationship", so you personally will decide the kind of fasting you may walk through it, it could be for several hours or days, but don't give the fasting all your interesting, cos fasting is a means and not a purpose.
As my experience I stopped of eating for a while until I feel hungry with a quiet period of praying and meditation.
We don't want to torture our bodies for God doesn't accept such a fasting, He gives us the body for worship him, and not for worship ours.
I Hope I added something useful to your walk with God.
Yours prayerfully,
Maranatha50