Welcome to the Cove - yes, it can be a bit daunting at first but it really isn't that complicated to develop a system for a small company.
I agree entirely with Ted when he asks about having training. Get along to an introductory course on ISO 9001 - just a 1 day would do for starters and it will help to explain a lot more than you can gain from just reading.
Then, as you point out, look at what 4.1a, b & c say. Identify your processes e.g. sales, purchasing etc. Then look how they fit together e.g. design followed by sales followed by planning etc (obviously you use your own company processes) and then decide how you will control each of them.
You may decide to document procedures in text format or have flowcharts or process maps etc or you may decide that the competence of the person doing the job provides the control. Decide what suits your business best as you will have to work with this. Whatever you do, don't develop a system to meet the standard, do it to suit your business and then cross check with the standard.
There are a number of people here who will remind you that you need a quality policy, which is true, and that too needs establishing early but personally, I would try to document the main business processes first.
Later, you will need to add some more procedures such as controlling documents and records, but they can come later.
I hope this helps but please ask around for more information as you need it.