invoice template

I need to keep track of my expenses, especially as I'm having building work done so need to keep track of all expenditure incl method of payment - eg, Cash, Internet Banking etc.
I am totally useless with figures and MS Excel is way way way past my abilities.

So therefore I need a free software program that comes as simple as it can.

Also, looking for software that I can use to design, print, copy etc personal business stationary templates such as for Client Quotes and Invoices / and customizable as well - as in, when I quote, I like to give a detailed itemized quote.