My next financial step

I may start a new page to link to for this, as it's only early stages a week old i need to see how i do over the coming months.
My plan now after working over 30 years of my life to make money to live i want to try and invest money to make money to live allowing me hopefully have something nice to retire on.
So far this week i have borrowed £100 from my credit card to invest in penny stocks and shares, my first aim is to pay back the £100 with anything i make and then i feel i can go ahead without feeling i have lost anything.
After this first week i think i started Tuesday i had made £24.47 by Friday evening, not a lot i know but it's not a loss and leaves me £80 to pay my credit card back.
My thinking is to start at the low end and if it works out invest more ie if i am making £20 off £100 a week what could i make off a £2000 investment or even a £20,000 investment, i am years away from this at the moment but we all need to start somewhere.
I must say before i started investing any cash in the stocks i did play/use the demo account first ie demo/virtual money just to get used to the feel of things, from then i went on Utube to see how people invest and then took the plunge.
I am not looking to make millions or a killing over night just a easier comfortable life without worrying how i can pay my holiday or car off ect.