I got my PPL a year ago, and flew club planes because I didn't have the cash to buy a plane or even a share.
But there are groups around that don't require a capital investment - either taking a refundable deposit or just a monthly fee (plus hourly usage charge). The only potential problem here is that they may want a minimum of 100 hours experience or an IMC. Depending on the balance between the monthly fee and hourly rate, it should work out cheaper than club hire if you fly more than 2 hours a month (but don't forget to build home landing fees into the equation - where I fly from, they are included in the price of club aircraft and do mount up when you do circuits).
I was lucky enough to join a group with low monthly (£20) and hourly charges (£55) and was also able to get named insurance coverage on less than 100 hours. In the 4 months since I joined the group I have flown our plane 26 hours - I had intended to fly about 30-40 hours this year and have now done over 60!
My advice would be to assess realistically how many hours you want to fly, and what sort of flying you want to do. Then by looking at the ads in Pilot or Flyer, you can start to work out costs based on the aircraft available for sharing and make a more informed choice. Hour building in a C152 will be a lot cheaper than in an Arrow, but you won't go so far or so fast!
I hope this helps. Good luck with your PPL.
Happiness is a £100 hamburger