Abortion is not caused by people being too lax with contraception choices and "using abortion as a back up". Nobody wants to have an abortion or thinks it's no big deal - seriously. If you can actually find an example of anybody who thinks this way it is a tiny minority of people usually who have bigger problems. The vast vast majority of abortions are a last desperate resort. They are not a contraception method.
If you actually care about reducing unwanted pregnancy as you profess to do so, campaign for stronger and more enforced laws about rape and abuse, including post DV and child protection.
Campaign for awareness about emotional abuse, coercive control and sexual coercion, as well as other forms of male violence such as sex trafficking, pimping and so on.
Support single mothers and do not demonise them for "making bad choices". Increase single parent benefits and/or campaign for stronger enforcement of child support by non resident parents.
Support inclusion of, funding and support for disabled people including families with disabled children.
Support measures which help women with addiction and mental health problems.
Campaign for free access to and education about contraception for every woman and girl. Free and easy access to the morning after pill. Education about the menstrual cycle. Support research into long term reversible male contraception, and more effective forms of female contraception.
Campaign for funded childcare in this country, and rent controls, making children more affordable.
Understand also that in some cases abortion may be the humane choice if a pregnancy is terminated before a child is born with such severe disabilites that their entire short life will be pain. Or the safer choice if a mother's health is put at serious risk by pregnancy and/or childbirth. Understand that at times the continuation of a pregnancy is at direct odds with the life and/or long term health of the mother.
I don't actually see a problem with the view that abortion is immoral because it's choosing to end a life, although I don't agree - but be consistent. If that's your viewpoint then you ought to logically be supportive of measures which reduce the situation of unexpected pregnancy in the first place, and/or measures which support women expecting in difficult situations so that they feel more able to keep their baby. You also need to square it with the opposing moral dilemmas in my previous paragraph. If you are consistent with all of this then I respect your view.
You must be extremely careful with the "pro-life" resources you consume. The vast majority of pro-life propaganda (and this is what it is, because much of it is not fact based) comes from an extreme Christian viewpoint in America where the actual underlying idea is that ending a pregnancy is immoral because it absolves a woman of the crime of being sexual while not under a man's direct control, and this is appalling and despicable. Do examine your views, because it's all nice and easy to say "Well duh of course it's bad to kill babies" but there are some really harmful beliefs that underlie a lot of this stuff. It's complicated. If you can really follow it right down you'll usually get to the root of what you believe, but focusing on abortion as an act is a red herring - look at what happens to lead somebody to the desperate state of considering an abortion.