Use what you have. When you find yourself wishing for a longer this or shorter that, your needs will become clear and you'll know which lens to get next. E.g., you may find the 72mm too wide for your taste and want something between 72mm and 150mm, or you may find the 150mm woefully too short for some jobs, in which case you'd want something longer. When you get to that point, we can give you a whole lot more specific advice.
Best,
Doremus
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