Not giving a shit about a lot of stuff. Opinions and so on. Drop what pulls you down.

(Yes there might be exceptions)

Exercise. Exactly how is not important. What matters is just being consistent. Eventually it becomes a habit that will grow with you.

If it’s difficult or frustrating, you’re probably trying too hard. Ease up next time. If it feels like a chore, you’re not doing the right activity for you. It should be enjoyable.