Safest time to go for a walk?

So I want to start taking more walks for my health and I was so excited until I remembered that it would just be me. Alone. I’m a small person who has experienced SA and I’ve been followed while walking home from school in the past, and I just can’t help but worry. As far as I know it’s a safe area (new to the area) and I see people taking walks all the time, especially older people, but I still worry so much that it gives me anxiety and now I’m not so sure anymore. I can’t help but wonder if something will happen to me and I feel like that all the time while going out alone. I always wonder if something bad will happen to me.