@a gentle voice , while the issue of having children is highly personal and I would never advise a person one way or the other, it seems to me that you are making a wise choice for yourself, from what you say.
I want to encourage you not to worry too much about that in terms of finding a partner, because a lot of people don't really want to have children, and more and more young people are making that decision these days than ever before, because they do not want to bring children into a world that may become uninhabitable for human beings within that child's lifetime.
A person who truly loves you for yourself is not likely to abandon you because you don't want to give birth, especially since you say you are willing to adopt if your partner decided they wanted a child.
There's never a guarantee with any marriage. One of you may change so much that it's no longer a viable partnership, one of you may die; many things can happen.
The best approach, IMO, is never, ever, to rush into anything. It's just not possible to know someone well enough in a short period of time. It's not possible to know how a person will respond to challenges or high stress in life until you have seen them challenged. You can't know if you and the other person will be good at conflict resolution until that has been tested several times. The best chance for having a good relationship for the long term is to be really good friends for a long time before even dating, let alone going into a romantic partnership. Most people who get divorced do so because they didn't know the other person well enough before they got married, and they had expectations that seemed totally reasonable to them but which the other person was not going to meet. It can turn out that each person has a completely different, and diametrically opposed, definition of a word such as "commitment". (Trust me on this.....been there).
Having a chronic health condition can definitely turn people away. But, we cannot help that. Best to find out ahead of time, and again the only way to do that is to know the person long enough. Once they have been through a couple of years with you and have been consistently kind and understanding and patient when you had to cancel plans, you have a pretty good idea of how they may be in a long term relationship. People are always on Good Behavior at first, but the true nature of a person comes out in time. The key is not to get too deeply involved, let alone married, until you have hung around long enough to have seen the true character of a person come out.
And this is key:
When a person shows you who they are, believe it the first time. Do not think it will change.
I wish I had learned this when I was in my 20s. It would have saved me a whole lot of heartbreak.