The best way is to talk to them. Go through the Player's Handbook and learn about Feats with your Dungeon Master. It might be worth explaining to your DM that they don't need to manage your Feats either - it's entirely up to the players whether or not they remember if they have a Feat and how they work. In the end, Feats are a core part of Dungeons and Dragons 5e, but it's up to your DM if they end up integrated into the game or not, especially if you try to pull off the innate magic loophole I mentioned previously.