Cloth diapering a 17 month old.

My son will be 17 months in a week. We’ve always used disposable diapers on him but now that I’m pregnant with our second, I’d like to give them a try to see how I like them when she’s here. Has anyone started this late? Should I just stick with disposable for him and start cloth when she’s here? If I get the size adjustable for my son, can I use them for my daughter or is that like not a thing? I honestly have no idea about cloth diapering 😭