My family thinks I'm crazy

So please do not judge if your gonna be hateful jut quietly leave.

So I went undiagnosed with PCOS for quite some time and unfortunately being fully untreated in anyway has taken a toll on my reproductive system. Long story short according to many tests and exams my biological clock is ticking.... And loudly. My gynecologist said I should start trying soon if I plan to carry a child again in case I have trouble getting pregnant since I won't have as long with my fertility. I've had two accidental pregnancies ending in miscarries so I may actually end up having more trouble maintaining one than getting one til my clock ticks out.

So in the next couple years I need to be ready to start trying cause a second opinion agreed it may be sometime soon or not at all. I know I want a baby and though I want to adopt one day I also want to carry and birth one of my children. Call me baby crazy but I am preparing to start trying in next year or two. I know I can figure out my financial situation by then and my mom is on board to help. The rest of my family thinks I'm insane though.

So any helpful info for planning for a baby? I think my only worry is going through another loss or not conceiving at all. I know I want this and can do it just really feeling the negativity and judgement.

Edit: try think I'm crazy cause I'm 20 rn and single with no plans to be married soon. I already know a good friend who is gay and wants to help me have a child to be my sperm donor and possibly also be a type of parent as he would be interested in being in the child's life.