I don't consider myself as an expert (honestly, I don't think anyone truly is in this market) nor a professional. But I wish someone had given me this advice when I first started a few years ago:
Zoom out, think long term, and most importantly don't FOMO!
Easier said than done, especially in the beginning. It's so easy to get swept away by the endless flood of Youtube videos and social media hype, even more so when you're just starting out.