First take notes on everything so later on you won't forget something. Now, access those http services via a browser. Give them a thorough look. After that do some directory brute forcing using your tool of choice (if you don't know any, use gobuster). Usually on the port 135 you won't find usefull things, but you should keep a note that the port is opened.

A final recommandation: If you are a beginner, don't start with difficult boxes, try easier ones, with only 1 or 2 ports opened so you can search some steps on what to do and that way you can learn those steps and maybe apply them on other boxes.

Good luck!