Good start to the collection mate, as you said you have to start somewhere as did I, as did we all
Like I said keep a close eye on eBay you can pick up some good not so rare figures for next to nothing in good condition, sometimes boxed as well, before you know it you will have a large collection then all you need to do is complete the lines you like by tracking down some of the rarer pieces, like I did on my Robocop Hot Toys figure.
Let me know If I can help/guide in anyway on this.
Check out
www.sideshowtoy.com for reference pieces (exclusives etc) might help.