Something that has helped me with self esteem (and I'm still working on self love) is literally patting yourself on the back every time you complete a task - whether it be a responsibility, task at work, or something you have done for somebody else. For everything you don't do unsuccessfully, say out loud, "I'll do better next time." and give yourself credit for trying. Eventually, you'll start looking for, and acknowledge, the things you do, which will make you feel better about yourself.

Go on line , there are numerous videos that guide you step by step
Here are a few that have tremendously helped me
Byron Katie, Brene Brown, Trent Shelton, Lewis Howes ,Wu Wei wisdom

For me I am a Christian and I had other Christians come around me, women who showed me who I am. And then aside from that I had or have a great therapist and other women who build me up. And actually we build each other up. But for many years I never had this

For me, it started with acknowledging just how rough life really is, and respect for just surviving the blows I was taking.

That led to a feeling of generosity to myself for my mistakes, and affection for the creature who was learning to navigate life despite an ugly upbringing.

Years have ripened my appreciation for the courage it takes to survive, in me and everyone else, because it is NOT easy. And love blooms naturally, I think, where sustained appreciation occurs.

All very best on your journey, Ragnarr! ❤️‍🔥

There are also multiple videos on YouTube for self-love, self-compassion. But I just started slow, giving myself some grace when I make mistakes, or don't perform to my own standards. If I find I am hearing too much criticism in my brain, it's usually not coming from my own mouth, but from my family's collective pie hole! That is not helpful to hear, so I challenge those, and internally give the message my special finger!