Can I apply for SSI?

I just turned 24 and have only had 3 jobs which all together didn’t even equal a year, so I know I don’t nqualify for SSDI. But I’m wondering if I can qualify for SSI. I’ve had chronic pain and other symptoms that make it impossible for me to get a job for 10+ years but only got an actual diagnosis recently. I have been diagnosed with Fibromyalgia and Chronic fatigue syndrome on 9/26/2024 and Postural orthostatic tachycardia syndrome (POTS) on 10/7/2024. I’ve only had one appointment each with both my rheumatologist and cardiologist. Can I apply with only 1 appointment with each doctor? I’ve had multiple tests done for both doctors and my PCP but I haven’t sat down with them since the first appointment where I got diagnosed. Is it too soon to apply even though I’ve been experiencing symptoms since I was a kid? I’m also married, I don’t know if that makes a difference.