Weight management and fitness is not a difficult problem, but that doesn't mean it's easy. When we think of people who are fit, the stereotypical person we picture isn't usually a math genius. If it were HARD to figure these things out, we wouldn't have that stereotype.
IMHO, the order of effectiveness is: Sleep > Hydration > Diet > Workouts > ... many other things ... > Oxygen Tank
1. Spend an hour or two today learning about how to calculate macros and figure out your TDEE (google it.) 2. Spend an hour or two each week learning how to cook something new. 3. And spend a couple hours each week being active (just walking is enough to start.)
None of this is "exciting" or an "adventure" but it works. The "hard part" is mental. It's about continuing when it's no longer fun or interesting any more. Or making it fun by doing things you love. Look at surfers for example.
One way people get through that step is external motivation. Asking HN is a great first step. Join a team. Hire a coach. Sign up for a competition. Others will welcome you because many of them have been where you are now.