Seeking advice on getting diagnosed with ADD

Hi! I think i might have undiagnosed add but im not entirely sure how to go about getting a diagnosis for it/what the process is. I think i may have it because i have poor time management, i either cant focus on anything or put all my attention to one thing, ill set my mind to go do something and three steps in ill completely forget what i was going to do, i recently realized i get excited during conversations and cut people off, its hard to maintain important information, i lose things easily, start something and then move onto something else midway, and i have these phases where im kind of obsessed with something (right now its vampire history lmao). Im not sure if these are exclusive to add/adhd or if it could be something else so if you have any experience with this id be super grateful if you gave some advice!!