If I were you, I'd do mushrooms. Acid can get away from you. Mushrooms are more body based. My recommendation would be to take a low dose, maybe less than two grams. Get familiar with the material. Be in a good space, physically and emotionally. The Mushrooms will show you a reality that has been there all the time. A lot of the times it can assert itself so, it's better to start off happy. The benefit of shrooms is that they do not last as long, so if you are finding yourself uncomfortable you can reassure yourself that it will not last long and you will move through it. And if you feel like it is not powerful enough you can always eat another mushroom. Have faith that good things are going to happen and know that the mushrooms will rearrange you in a way that you may not understand and that you do not have to. Let them work. They can show you such beauty and they can be really healing. They are so worthwhile. I know you are in a city, but if you feel like it, try to get somewhere you can experience a little nature. Perhaps a park. Sunshine, leaves, trees, bushes, can really reveal a deeper order to you when you are in a Psychedelic state and they can reflect your deeper order. Your curiosity is there for a reason, trust it. But start slow. I personally have probably done Mushrooms 35 times over the thirty years or so, and I haven't ever had a bad trip. It will be very expansive no matter what happens. Having said that, I've had a couple experiences on LSD, that were less enjoyable. It's more mental than shrooms. Anyway, hope that this is helpful.