New to crypto (advice needed)

Hi all, I’m fairly new to cryptocurrency trading around 6 months under my belt so far. Has anyone got any advice for a newbie? I have around £1k invested in a couple of coins but I don’t know if it is the right coins to invest in etc… I understand the fundamentals of cryptocurrency, but I do know that the cryptocurrency world is a big one Im not a serious trader I have spare cash to invest for my future but don’t want to make any stupid mistakes that most people do when they start trading, If anyone can help with any advice they can give it’s much appreciated, I can post my portfolio or coins that I’ve invested in if anyone Needs to give me pointers in what I’ve done right or wrong. Thanks all :)