How do I teach myself SELF DISCIPLINE?

RiRi , P & PJ’s Mom 💗💖💙
And I mean SELF DISCIPLINE IN EVERYTHING. I'm a good mommy, but in regards to that I need to put my baby on a schedule and STICK TO IT. The STICK TO IT is always my weakness when it comes to any area in my life. I need SELF DISCIPLINE in every area of my life including love, love as in keeping people out my life who keep hurting me I keep letting them back in after letting them go and i mean it's such a circle where I'm losing complete hope in myself being able to ever change in general. I need it the area of To Do list, I'm a mommy and thats it, yeah doesnt feel right to me. I am one of those people who need more to make me feel whole and happy. So those are my 3 areas I need SELF DISCIPLINE in. How do I start practicing this so it REALLY sticks? Any advice or tips are VERY. SUPER. helpful. Thanks in advance.