One of the suggestions in the accepted answer was SSD.
On their website, SSD mentioned a competitor, faster_rcnn.
faster_rcnn was deprecated in favor of Detectron.
Detectron was deprecated in favor of Detectron2.
Long live detectron2.
It looks pretty cool and powerful:
Since this a classification problem you will use a CNN preferably. Then you need to fix an architecture of the CNN like VGGNet or Resnet or Le-net. You can find details on architectures here- Neural Network Architecures. As a beginner you can use VGG 16. You can read about the architecure here- Medium.com blog on VGG 16.
which tools/tutorials i should look ...