If I could boil down what I've learned:

• Learn from your mistakes, forgive yourself, and move on.
• Hodl before you start trading with any kind of short-term expectations and start small when you do. Always do your own research and you'll continue to find good tools and opportunities to improve your decision-making.
• Listening to others isn't necessarily a bad thing but do so with a critical ear.
• Last but not least, down periods are your buying opportunities so don't let them get you down!