Ladder thoughts

Ladder thoughts don’t cause good feelings for me, they are something I repeat but don’t believe.
“I’m learning to believe differently about myself.”
“”I’m willing to see this as not a problem.”
When the old thoughts I’m trying to replace come to mind I often just cry. I try to feel the feelings and let them happen understanding they are only a vibration.
1- How many weeks or months might the frequent crying last and does it help? (It started during the January “Thoughts about You.”)
2- What can I do to believe the ladder thoughts and feel better?