I don’t mean to piss on your fire but £1200 on £10k this year is really poor.
blimey, bit harsh! it's actually not bad if you're looking at the calendar year and excluding the covid dip. Maybe that 10k was all invested in a passive manner January/February last year and that's the annual return. In which case they didn't sell the dip, so are automatically winning!
OP, learn the difference between trading and investing.
When it comes to investing, learn about how you can invest (things like funds, etfs, bonds and also the online platforms) and just jump in with money you don't need for 5-10 years, ideally adding money as you go.
it's not rocket science, and it can be done very passively. It's brilliant some have made outstanding returns, but that takes a little more sophistication (and a little luck!) to know exactly what markets/shares/sectors to buy. You might get the bug and get there yourself, but for now just look at how to buy funds and etfs.
As you said, you absolutely don't need to be some finance genius with years of experience and training.