Conservative (with a small c) investor viewpoint here.
You don’t say if you have any savings at this point in time. If you don’t, I would be inclined to open a Marcus savings account and pay in to that until at least one month’s pay is banked before looking at investing. It’s useful to have something to fall back on that isn’t your investments, because there’s every chance that emergency could come along while your investments are in a dip. Better to have the savings account so you can ride out the dip then make a loss and miss out on future gains.
But as for Freetrade, at £250 a month I’d be looking at ETFs. I’d keep putting it in to VWRL until I had a good few grand there. Personally I’d be wary of picking individual stocks at that level; granted, with great risks come great rewards, but also great losses. A bad pick or two could wipe out all gains and more, but an ETF (should) keep ticking upward over time).
I’d want to have a good few grand in ETFs before looking at individual stocks, and I’d also diversify with different ETFs first too (VUSA for US exposure, VMID for FTSE 250 exposure, for example).
It might be an interesting exercise to keep a shadow portfolio, where every time you’re investing in ETFs you also make a pretend investment in what you might pick if you were looking at individual stocks. This could be a spreadsheet you keep yourself and update manually or using various integrations available, or it could be a website where you can build and track portfolios. That will allow you to see over time how your pretend performance compares to your actual performance (in my case, it demonstrated I wasn’t the greatest at making individual picks!) and means that when you do come to pick individual stocks later, you do have some experience (even if it was pretend) to call upon.