I think hearing real experiences would be more useful than just reading general advice.
There are countless stories out there about the mistakes new Bitcoin users make, and the OP can find plenty of examples in existing posts, or threads.
My biggest mistake was not buying Bitcoin back when I was in high school; I remember the price was incredibly low compared to what it is now. If I had just pushed myself to buy whatever amount I could afford back then, I don't think I’d have such regrets today. Another regret is; that I didn't educate myself about Bitcoin at the time, I really should have gotten involved sooner, especially since my friends were already active in the crypto space, including Bitcoin.
I have another example involving a friend of mine. He once received a loan in the form of Bitcoin, and said he wanted to try using it for various purposes. Do you know what he actually did with it ? He didn't do anything at all, yet he claimed he had used it. At the time, he was hesitant; afraid to actually use it for fear of making a mistake, but do you know what his error was ? He didn't realize that his address could be tracked on the blockchain.