QGIS is still a little new to me so this question may seem silly. I'm trying to interpolate the depths of ground water aquifers with a few known data points from the field study. The objective here is to map the contours of that particular catchment's depth of bedrock or aquifers so that we can strongly assume the ground water depth values for the ones we don't have a depth value? Our study area is on the peri urban small towns of Bangalore, India

I'm trying to interpolate the depths of ground water aquifers with a few known data points from the field study. The objective here is to map the contours of that particular catchment's depth of bedrock or aquifers so that we can strongly assume the ground water depth values for the ones we don't have a depth value? Our study area is on the peri urban small towns of Bangalore, India