Turning 18 very soon, always planned to start investing - I’m now concerned due to Trump/ economy

Hi, I’m turning 18 very soon and am from the UK. I planned for years to start investing my own money pretty much as soon as I turned 18, but a couple of weeks ago my parents said they would give me access to my savings and could use that to invest/ put into a bank account etc.

The amount was higher than I had expected and of course I’m really happy and it will be such a useful starting point for investment. I intend to top up the investment fund monthly with spare money which I get from my job. I plan on using Trading 212, and putting the majority of the money into the S&P 500, a bit into the FTSE, and a tiny amount into a few others (I have QQQ, VUAG and VUSA written down but I can barely remember what they are and will do more research).

The problem is, I keep seeing in the news/online about how, due to many things but especially the election of Trump, the economy is in a bad place right now and the stock market is very volatile. I don’t mind if the ROI is below average, I just don’t want to lose any money - especially my savings, which has been saved up my whole life by my family and could mess up my future if I lose. Should I invest now or wait a bit? Thanks!

TLDR - I’m turning 18 and have got some money to invest, but am unsure due to state of economy/ stock market.