Imho i'd forget about the squats,situps and skipping as said above. Also as your a beginner forget about doing sprints,intervals,track or hill sessions,its totallly pointless at this stage.
What you'll need to do is build up a base. All distance runners do this by what is known as LSD (long slow distance )Pretty much is what it sounds like,jogging well below race pace for extended periods of time. As your not a runner just yet i would adivse you take a different approach(for now),use the rule of 5
4 mins walk, 1 min jog = 5 mins X 6 = 30 mins, try to do this every other day until you feel comfortable(i.e. no gasping for air,no burning throat,no lack of control of your legs)
Once youve done that you simply modify the rule of 5.
3 mins walk, 2 mins jog X 6, again to you feel comfortable to move on.
2 mins walk, 3 mins jog X 6
1 min walk, 4 mins jog X 6
Buy now you'll probably be well on your way to comfortably jogging a 30 mintue session. From here on you can try jogging 30 mins every other day and increase this time by no more than 10% every 3-4 weeks.
I would advise getting a decent pair of shoes suited to your foot, and maybe some twin skin socks to keep the blisters at bay.
If there pain/niggles at any time stop,its so easy to pick up an injury and if its not addressed asap can cause probs later on in life.
Remember your not going to be going out breaking any records or winning any prizes so dont over do it,both in training and whilst racing.
Take your time,soak up the atmosphere and ENJOY IT

Rob