how do you go outside and do what you have to do with social anxiety

I also have social anxiety, not severe but i still get paranoid, i normally listen to music and focus on that when walking places, i try not to look at ppl i look thru them, focus on ur destination and what u NEED to get done, like instead of looking at ppl look behind them focus on the side walk 10 ft in front of u, or a building or maybe a tree, its takes time so its no rush, but fake it till u make it, head up, shoulders back chest out, once ur able to do that itll be much easier going places, itll be like starting a new job its scary at first but once u get the hang of it u feel like a pro lol