Nutrition gets made more complicated than it needs to be. Here's what actually matters when you're starting out.
Three things do the heavy lifting: protein repairs and builds muscle tissue, carbs fuel your training and daily activity, and fats keep your hormones working the way they should. You need all three — not "carbs bad" or "fat bad," just enough of each to support what you're trying to do.
The myths that trip people up most: that fat makes you fat (it doesn't — excess calories from any source do), and that carbs kill muscle gains (they don't — they fuel the training that builds the muscle). Whole, minimally processed food solves most of this without needing to track every gram.
Practically, that means: read labels so you know what you're actually eating, shop mostly the edges of the grocery store where the unprocessed food lives, and build meals around a protein source, a carb source, and some vegetables. That's most of the work done right there.
Supplements — protein powder, creatine, fish oil — can fill real gaps, but they're a small piece next to actually eating well and training consistently. Don't let supplement shopping replace the boring, useful stuff.
Give yourself time to adjust. What works for someone else's body and schedule won't be identical to yours — pay attention to how you respond and adjust from there.
