Is it weird to ask for milder drinks/coffee

So I have always struggled with coffee orders mainly because they are most of the time too strong for me but also I've got stomach issues so anything too milky or strong gives me issues. I've always been shy to ask for weaker drinks so end up just powering through stomach pain but I want to stop that. I've been to a few cafes that ngl make me sooo anxious to order like one time i asked if they had syrups and they were like we dont have those and I don't want to somehow offend baristas by being like can you use less espresso or add more water because I do like having a coffee just more mild anyways my question is how unusual is that and how can I ask for modifications without irritating the barista, thank you. Same goes for hot chocolate like can I ask for less chocolate? if its too rich