There's More Than One Constitution 'round These Parts
Roe v Wade was always a stop-gap. I'm glad we had it for as long as we did, it provided proof that abortion rights do no harm to a country, and actually make it stronger. But it is there to cover for the lack of abortion protections in the constitution. That grace period will soon be over.
Abortion rights should be protected by the law. These protections should be in the Constitution, to make them as durable as possible. They should, in fact, be in every country's constitution, just like Freedom of Speech and Freedom of Religion should be.
Putting these protections into law for every person on Earth is both important, and currently impossible. It is an effort of generations. Putting these protections into law for American citizens is easier, maybe only a matter of years. But it is also difficult. Just like there are tens of millions of people in Iran who would literally take up arms to kill someone who tried to grant them freedom of religion, there are millions of people in Texas that will pay tremendous costs to stop someone trying to grant them abortion rights.
Fortunately, every state has its own constitution. California doesn't need to invade Texas to protect its own citizens. Texas doesn't need to invade California to ban abortions over there. Once Californians amend their constitution they will be safe within their own state, and will be free to begin (or continue) the work of slowly lifting anti-abortion communities out of their dark ages. We start with the fortresses we have, and we work outward from them.
It is possible there will always be a state or two with abortion bans, which the truely obstinate will retreat to. Much like it's possible there will always be a few nations of theological absolutism, that the zealots can flock to and live in joyful misery. That's a problem for a future day.
Today's challenge is to secure abortion rights in your state. Get them in the constitution. Worry about other states after that.
Once that is done, help make others safe. Pre Civil War, some of the most meaningful good that a private citizen could do is helping slaves escape to free states. There is a similar importance in helping people escape to pro-abortion states. Per @yashkaf - "the best thing blue state democrats can do for abortion access is get rid of NIMBY zoning and occupational licensing so that poorer women can actually find jobs and move to blue states."
If you live in a blue state, start removing obstacles to dense housing and employment.