If investments are something you think you be doing long term. I’d highly recommend reading about how fees effect compound interest over the long term. Someone did a guide here a few months ago, I’ll see what I can find.
Plum is expensive for what they do. They take a quid, plus up to 0.9% platform fee and an extra 0.15% for their own pockets. There’s no two ways of looking at it, that’s a lot!
I’d recommend reading up on a Vanguard Lifestrategy or Vanguard Global All Cap ETFs. If they meet your risk palate they’ve both proven to be good performing, resilient funds.
Edit, here’s the post: A lil' doc to help you understand savings and investment