Solo hikes are great. Not only you can manage your own pace. But also, the sense of accomplishment a 'solo' hike gives is indescribable. But the responsibility falls only on your own shoulder and there can be a lot of risks and threats out there as well depending on the hike. So, my advice would be to be realistic about your skills, pain tolerance, endurance, and what you enjoy. Avoid taking unnecessary risks especially if its the first solo hike.