front page grid products image

Hello. I have a new Shopping Web Site. How can i add in Front Page, a grid of new products or 4 images in a row clickable how sends you on Product page in Virtue Free theme.(i do not purchase the full theme) I try everything put i can’t put 4 clickable images or products in a row, or a product grid of 4 rows and 4 columns.
I add Woocommerce Products Slider and i tried with it to add on front page some Features Products but the sizes of images in slider they are looking in different shapes and this doesn’t look good. What can i make? How can o put all in a same size or shape?