Once docking process done successfully, you can find the results in the bottom panel and it it will be downloaded (as excel). From the data, you should list the ligands based on minimal binding energy (highly negative sored one is best ligand). you can open the receptor molecule in pymol and open the ligand (from the resulted ligand folder of pryx ) in the same window of pymol. Now you can analyze poses and interaction hydrogen bonds and their lengths with residues. plenty of videos are available in YouTube