Considering a Service Dog for My Visual Impairment and Anxiety

So I am legally blind and I am thinking about getting a service dog. I am mostly blind in my left eye and I can only tell between light and dark. For my right I can read and be on my phone if it is close to my face, but I can't drive or do stuff like that. I have been running into stuff a lot more lately and with depth perception (i have fallen i font know how many times when i think thwre is a step but there isnt and the other way around)I was wondering if I could have a service dog that can help mostly with that, and also maybe with my anxiety because I have bad anxiety spells at times, but I feel guilty for thinking that I could possibly get a service dog to help seeing as there is a lot more people with worse health issues that could use one more than me. Do you think I should look into getting one?