Hi Claire and welcome.
First of all don't panic. You may have only recently been diagnosed but you have probably been living with bronchiectasis for a long time as it is damage to the lungs caused by a trauma such as whooping cough, pneumonia or as in my case 'nobody knows' often in childhood.
I am 64 and have had extensive bronchiectasis since I was a baby. I have two children and am still living a full life. I have what they call exacerbations when it plays up and I then have antibiotics. Also I have had nebulised antibiotics and inhalors, depending on the different bugs which grow in the fluid which collects where the damage is in my lungs.
it is important that you take charge. Needless to say a healthy lifestyle and no smoking or or other people's smoke.
Taking charge also means that you need to do your own physiotherapy every day to get rid of the stuff in your lungs and with it the bugs which make you ill. You may be one of the lucky ones who don't produce much or any sputum. If so, congratulations you are winning already. I have always produced a lot of the stuff and managing it is just part of my life.
I suggest that you learn as much as you can about your condition because unfortunately most medics know very little and the emphasis in the government and medical circles is on copd.
Do find out if your consultant specialises in bronchiectasis or simply deals with lung conditions generally as it is very specialised and every one of us is different. Insist that you have time with a physio who can show you good methods to empty your lungs. Ask what your treatment plan is (that usually throws them but they should give you one)
It is the exacerbations which knock us sideways so you will need emergency antibiotics to keep at home, agrred with your consultant and GP.
Then, once you have organised your treatment and living plan, just get on with your life as you were before the pesky little devil decided to play up. You are not on your own, there are a lot of us out there and the good news is that you can live a full life with,it.