Just started Tobramycin Sulf 40mg/ml Inj, 30ml for a serious lung infection. What should I expect?

I've just begun treatment with Tobramycin Sulf 40mg/ml Inj, 30ml for a severe lung infection. The doctor explained that it's a powerful antibiotic given by injection, but I'm a bit nervous about the potential side effects. I've read about the urgent and other possible side effects, and I'm trying to stay calm, but I could use some advice from others who have been through this. How should I prepare for the treatment, and what can I do to manage any side effects that might come up? Also, how long does it typically take to see improvements in the infection? Any tips or personal experiences would be greatly appreciated!