Even with a £1, you should be investing in a diverse number of areas and spreading your money across industries. This way, you balance out your investment portfolio and ensure lower risk when investing. 

There are many digital investing services out there that will assists you in investing if you are a newbie. Before, there was a high barrier to entry for investing. But now, a website and digital assistant can guide you through the process. 

Do a quick search on Robo investing to learn more...

Try investing small amounts into the market at a time on a consistent basis. It could be as little as $10-$15 a week. By doing this, you are slowly growing your portfolio, but also minimising your risk.