What's your motivation style? How do you respond to expectations, both your own and those of others?
For any lifestyle intervention, it's crucial to understand the most consistent way to keep that motivation up. It's possible that what works for others might not work for you, and that's okay!
I like to recommend "The Four Tendencies" by Gretchen Rubin to my patients, as it discusses this very topic. She also has a free quiz on her website that can give you an idea of your tendency and give you some ideas on how to help yourself stay motivated!
In regards to specifically weight loss and physical activity, I think the most important thing is to focus on small, sustainable changes, rather than sweeping overhauls. If you change too much at once, it's really easy to get in over your head and want to scrap the entire program. The trick is finding high-yield incremental changes that truly make a difference, but aren't too overwhelming to stick to.
Best wishes, and feel free to reach out if you need any assistance!