@Johann
Anxiety at this time is normal. You have just been diagnosed with a life threatening disease. You are in the happy position (though it won’t feel like it for a while!) of being diagnosed early, when you have the very best chances of kicking it.
Take things one day at a time. Looking too far ahead at this stage is just confusing. It may not help but life is full of unknowns - we think we have our lives planned and sorted but that’s a bit of a nice illusion. And sometimes the things we haven’t planned or anticipated can be really good. Cancer isn’t, but learning to live with the capacity to make the best of what occurs can be liberating.
Deep breaths, you can do this, we all find strength we didn’t know we had. If you have family and friends to support you, let them know what you need (and what you don’t!). Things get clearer when you have a treatment plan and you have something constructive to focus on. Best wishes.