what do you mean dabble?
If you want to start trying to make money from buying and selling I reckon that would take a vast amount of research and skills acquired to do that.
If you want to invest long term however, then start by researching index funds, I have a fste 250 index fund which is basically a little of every company in that index.
I also have vanguard funds and nearly all my research came back to Vanguard I have 2 life strategies, one in my SIPP and one in my ISA, you can expose yourself to less or more risk generally based on how old you are.
Risk is balanced between equities and bonds, eg 20% bond 80% equity is higher risk,
I don't view vanguard personally as high risk because these funds are a little of everything all over the world so very balanced .
I am not a fan of fund managers like Lindsell train or Fundsmith however I do hold some of their funds. But they are my take a punt funds - although I think the stocks they hold are good quality.
I started by reading about index funds, cross reference what you read.