Warning signs: betting to recover losses, staking more than planned, hiding activity from people close to you, betting to fix a mood, or betting money that has a job elsewhere.
Set deposit, time and loss limits with your operator before you need them, and use self-exclusion tools without embarrassment if those limits are not holding.
Sports betting is entertainment with a negative expected return for almost everyone. Any framing that treats it as an income source is the most dangerous idea in this space.
Free confidential help is available 24/7: call 1-800-GAMBLER or visit the National Council on Problem Gambling. It is 21+ where legal, and it should always stay optional and enjoyable.